subject:(Pollen Louisiana Atchafalaya River )

McGill University

1. Smirnov, Alexei. Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A.

Degree: MS, Department of Geography, 1995, McGill University

URL: https://escholarship.mcgill.ca/downloads/2514nn874.pdf ; https://escholarship.mcgill.ca/concern/theses/wd375z79t

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The objective of this research is to develop a better understanding of the nature of transport and distribution of pollen in river systems. Interpretation of… (more)

Subjects/Keywords: Pollen – Mississippi River.; Pollen – Louisiana – Atchafalaya River.

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APA (6^th Edition):

Smirnov, A. (1995). Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/2514nn874.pdf ; https://escholarship.mcgill.ca/concern/theses/wd375z79t

Chicago Manual of Style (16^th Edition):

Smirnov, Alexei. “Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A.” 1995. Masters Thesis, McGill University. Accessed March 07, 2021. https://escholarship.mcgill.ca/downloads/2514nn874.pdf ; https://escholarship.mcgill.ca/concern/theses/wd375z79t.

MLA Handbook (7^th Edition):

Smirnov, Alexei. “Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A.” 1995. Web. 07 Mar 2021.

Vancouver:

Smirnov A. Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A. [Internet] [Masters thesis]. McGill University; 1995. [cited 2021 Mar 07]. Available from: https://escholarship.mcgill.ca/downloads/2514nn874.pdf ; https://escholarship.mcgill.ca/concern/theses/wd375z79t.

Council of Science Editors:

Smirnov A. Spatial and Seasonal Variations of Pollen in the Mississippi and Atchafalaya Rivers, U.S.A. [Masters Thesis]. McGill University; 1995. Available from: https://escholarship.mcgill.ca/downloads/2514nn874.pdf ; https://escholarship.mcgill.ca/concern/theses/wd375z79t

Louisiana State University

2. Rosen, Timothy. Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex.

Degree: MS, Environmental Sciences, 2012, Louisiana State University

URL: etd-01152013-123524 ; https://digitalcommons.lsu.edu/gradschool_theses/1798

► The modern day Mississippi River Delta Plain and the Louisiana Chenier Plain have been greatly altered through anthropogenic changes to course and hydrological conditions of… (more)

Subjects/Keywords: Mississippi; Louisiana; Chenier Plain; River Hydrology; Sediment; Coastal; Atchafalaya

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APA (6^th Edition):

Rosen, T. (2012). Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex. (Masters Thesis). Louisiana State University. Retrieved from etd-01152013-123524 ; https://digitalcommons.lsu.edu/gradschool_theses/1798

Chicago Manual of Style (16^th Edition):

Rosen, Timothy. “Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex.” 2012. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-01152013-123524 ; https://digitalcommons.lsu.edu/gradschool_theses/1798.

MLA Handbook (7^th Edition):

Rosen, Timothy. “Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex.” 2012. Web. 07 Mar 2021.

Vancouver:

Rosen T. Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex. [Internet] [Masters thesis]. Louisiana State University; 2012. [cited 2021 Mar 07]. Available from: etd-01152013-123524 ; https://digitalcommons.lsu.edu/gradschool_theses/1798.

Council of Science Editors:

Rosen T. Long-term total suspended sediment yield of coastal Louisiana rivers with spatiotemporal analysis of the Atchafalaya River Basin and Delta Complex. [Masters Thesis]. Louisiana State University; 2012. Available from: etd-01152013-123524 ; https://digitalcommons.lsu.edu/gradschool_theses/1798

Louisiana State University

3. Munnelly, Ryan Thomas. Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters.

Degree: MS, Oceanography and Atmospheric Sciences and Meteorology, 2016, Louisiana State University

URL: etd-04112016-091604 ; https://digitalcommons.lsu.edu/gradschool_theses/1070

► A distinctive feature of coastal Louisiana is the unrivaled network of oil and gas installations (platforms) extending from inshore waters to the deep Gulf of… (more)

▼ A distinctive feature of coastal Louisiana is the unrivaled network of oil and gas installations (platforms) extending from inshore waters to the deep Gulf of Mexico. Since 2007 there has been a 38% reduction in platform numbers with the highest removal rates occurring in shallow (< 18 m) nearshore waters. Many fishes and invertebrates are attracted to platforms, presenting a unique opportunity to study detailed species-specific responses to the river-influenced hydrographic characteristics of Louisiana’s nearshore zone (5–25 km water depth). Prior studies of fishes around platforms focused on a few relatively large platforms in water depths ≥ 18 m. However, about one-third of all platforms are small, unmanned and non-drilling platforms located in waters < 18 m depth. Paired video and hydrographic data were collected at 150 small platforms in < 18 m water depth during the summers of 2013–2014. Fifty-four species of fishes were associated with small platforms. The assemblage(s) included juveniles of 29 species, indicating the importance of nearshore platforms as diverse nursery habitat. The coastal zone was divided into three regions based on broad-scale interactions between freshwater input and bathymetry driving major distinctions in interregional hydrography and fish assemblages. Co-occurring within this expansive artificial reef network is the second largest hypoxic area (dissolved oxygen (DO) < 2.0 mg l−1) on Earth. Platforms offer reef-like habitat features in the upper water column that may offer refugia for some reef-associated species during hypoxic events. Significant intraregional differences in physicochemical features were related to the presence of hypoxia (defined as DO < 50% saturation), as well as the distribution of sandy shoals. Eleven species accounted for most of the assemblage dissimilarities, composing ~93% of fishes observed. Habitat suitability indices for these 11 species provided information about habitat selection across horizontal and vertical physicochemical gradients throughout the coastal zone, and within hypoxic and well-oxygenated stratified water columns. East Bay, near the outlet of the Mississippi River, exhibited less hypoxia and a distinct fauna that included four adult goliath grouper (Epinephelus itajara). This endangered fish was observed during spawning season (summer), suggesting that East Bay might support a spawning aggregation.

Subjects/Keywords: fish; nearshore; Louisiana; oil and gas; platform; river; Mississippi; Atchafalaya; hydrography; eutrophication; hypoxia; shoal

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APA (6^th Edition):

Munnelly, R. T. (2016). Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters. (Masters Thesis). Louisiana State University. Retrieved from etd-04112016-091604 ; https://digitalcommons.lsu.edu/gradschool_theses/1070

Chicago Manual of Style (16^th Edition):

Munnelly, Ryan Thomas. “Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters.” 2016. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-04112016-091604 ; https://digitalcommons.lsu.edu/gradschool_theses/1070.

MLA Handbook (7^th Edition):

Munnelly, Ryan Thomas. “Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters.” 2016. Web. 07 Mar 2021.

Vancouver:

Munnelly RT. Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters. [Internet] [Masters thesis]. Louisiana State University; 2016. [cited 2021 Mar 07]. Available from: etd-04112016-091604 ; https://digitalcommons.lsu.edu/gradschool_theses/1070.

Council of Science Editors:

Munnelly RT. Fishes Associated with Oil and Gas Platforms in Louisiana's River-Influenced Nearshore Waters. [Masters Thesis]. Louisiana State University; 2016. Available from: etd-04112016-091604 ; https://digitalcommons.lsu.edu/gradschool_theses/1070

Louisiana State University

4. Engel, Matthew Aaron. Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana.

Degree: MS, 2003, Louisiana State University

URL: etd-0709103-111512 ; https://digitalcommons.lsu.edu/gradschool_theses/4221

► The Atchafalaya River Basin (ARB) experiences overbank inundations as springtime temperatures warm that create conditions favorable for bacterial respiration, which results in hypoxic conditions (dissolved… (more)

▼ The Atchafalaya River Basin (ARB) experiences overbank inundations as springtime temperatures warm that create conditions favorable for bacterial respiration, which results in hypoxic conditions (dissolved oxygen [DO] ≤ 2.0 mg/L). Previous ARB research has shown that pelagic larval fish populations are impacted by hypoxic conditions, and that larvae may use macrophyte beds (e.g., hydrilla Hydrilla verticillata) as DO refugia. I examined the relationship between physicochemistry and the distribution and abundance or larval fishes associated with ARB macrophyte beds during 2001-2002. Larval fishes were collected with light traps at two normoxic and hypoxic sites, and at each site, surface and subsurface traps were placed in open channels, hydrilla beds, and the interface between the channel and macrophyte beds (border). Of the 1,718 larval fishes representing 10 families that were collected, centrarchids Lepomis spp. (45.5%) and catostomids Ictiobus spp. (25.7%) dominated the 2001 assemblage, whereas percids Etheostoma spp. (29.1%) and centrarchids (17.8%) were most abundant in 2002. River stages between years were different from each other (P < 0.001), and from the 42-year stage average (P < 0.001). Between-year differences in flood pulse timing and duration resulted in higher pH, temperature, and DO levels, and 2.5 times more larval fishes in 2001. Overall, larval fish abundances under hypoxic conditions were severely reduced during both years. Under normoxic conditions, larval fishes were collected from all habitats, but were typically in higher abundance in nearshore areas regardless of cover conditions (hydrilla vs. no cover). Larvae that could withstand hypoxic conditions (centrarchids, clupeids, cyprinids, and percids) were typically found in nearshore areas associated with hydrilla beds. Because of the increased abundance of predatory invertebrates in these areas, the use of hydrilla beds by fish larvae as oxygen refugia may provide optimal physiochemical conditions at an increased predation risk. Man-made alterations in the ARB have changed circulation patterns on the inundated floodplain, which contribute to seasonally widespread hypoxic conditions and reductions in larval fish abundance. Thus, any management plan that increases the historic connection between the mainstem Atchafalaya River and the floodplain, and improves floodplain circulation would benefit larval fish production in the ARB.

Subjects/Keywords: atchafalaya; river; louisiana; physicochemical; hydrilla; larval fishes

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APA (6^th Edition):

Engel, M. A. (2003). Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-0709103-111512 ; https://digitalcommons.lsu.edu/gradschool_theses/4221

Chicago Manual of Style (16^th Edition):

Engel, Matthew Aaron. “Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana.” 2003. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-0709103-111512 ; https://digitalcommons.lsu.edu/gradschool_theses/4221.

MLA Handbook (7^th Edition):

Engel, Matthew Aaron. “Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana.” 2003. Web. 07 Mar 2021.

Vancouver:

Engel MA. Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2003. [cited 2021 Mar 07]. Available from: etd-0709103-111512 ; https://digitalcommons.lsu.edu/gradschool_theses/4221.

Council of Science Editors:

Engel MA. Physicochemical effects on the abundance and distribution of larval fishes in the Atchafalaya River Basin, Louisiana. [Masters Thesis]. Louisiana State University; 2003. Available from: etd-0709103-111512 ; https://digitalcommons.lsu.edu/gradschool_theses/4221

University of Florida

5. Almulla, Mohammad Y. Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006.

Degree: PhD, Geography, 2018, University of Florida

URL: https://ufdc.ufl.edu/UFE0052038

Subjects/Keywords: atchafalaya-river; geomorphology

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APA (6^th Edition):

Almulla, M. Y. (2018). Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0052038

Chicago Manual of Style (16^th Edition):

Almulla, Mohammad Y. “Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006.” 2018. Doctoral Dissertation, University of Florida. Accessed March 07, 2021. https://ufdc.ufl.edu/UFE0052038.

MLA Handbook (7^th Edition):

Almulla, Mohammad Y. “Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006.” 2018. Web. 07 Mar 2021.

Vancouver:

Almulla MY. Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006. [Internet] [Doctoral dissertation]. University of Florida; 2018. [cited 2021 Mar 07]. Available from: https://ufdc.ufl.edu/UFE0052038.

Council of Science Editors:

Almulla MY. Channel Bed and Geometry Changes in the Upper Atchafalaya River 1967 to 2006. [Doctoral Dissertation]. University of Florida; 2018. Available from: https://ufdc.ufl.edu/UFE0052038

Louisiana State University

6. BryantMason, April Elizabeth. Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River.

Degree: PhD, Environmental Sciences, 2012, Louisiana State University

URL: etd-11112012-181035 ; https://digitalcommons.lsu.edu/gradschool_dissertations/900

► Summer hypoxia in the Northern Gulf of Mexico has been attributed to large nutrient inputs, especially nitrate-nitrogen, from the Mississippi-Atchafalaya River system. The 2008 Gulf… (more)

▼ Summer hypoxia in the Northern Gulf of Mexico has been attributed to large nutrient inputs, especially nitrate-nitrogen, from the Mississippi-Atchafalaya River system. The 2008 Gulf Hypoxia Action Plan calls for river corridor wetland restoration to reduce nitrate loads, but it is largely unknown how effective riverine wetland systems in the lower Mississippi River (MR) are for nitrate removal. This dissertation research examined nitrate and carbon export from the Atchafalaya River (AR) to: (1) determine nitrate processing by a river swamp basin under varied seasons, (2) investigate nitrate retention and processing in the AR during a major flood event, and (3) assess the relationship of nitrate with organic and inorganic carbon in the AR and MR. I investigated changes in nitrate, δ15NNO3, and δ18ONO3 for water samples collected biweekly to monthly from April 2007 to April 2009 at the AR input- (Simmesport) and outlets (Morgan City and Wax Lake) and on the MR at Baton Rouge. Water samples were also collected weekly during the 2011 major MR spring flood (May to July) and analyzed for nitrate isotopes and concentrations. AR outflow had significantly, but only slightly lower mean nitrate concentrations (1.1 mg L-1) and δ15NNO3 (7.0o/oo) than the MR (1.5 mg L-1, 7.7o/oo); with no difference in δ18ONO3 (4.6o/oo). Limited differences in both isotope values between the two rivers reflect limited nitrate processing in the Atchafalaya. During the 2011 spring flood a total nitrate-nitrogen mass load of 89,600 megagrams (Mg) entered the basin and 83,200 Mg exited the basin, resulting in a low 7% retention of NO3N. There was little variation in δ15NNO3 and δ18ONO3 values between the input and two outlets, further indicating little nitrate processing in this system. The AR appears to have an additional and potentially higher quality organic carbon source from the Red River. The findings in this dissertation research show that as currently designed, dissolved nutrients like nitrate and DOC in the Atchafalaya are transported with little processing. This suggests the Atchafalaya and potentially other similar systems may be ineffective in reducing riverine nitrate because of limited residence time necessary for the biochemical reactions to occur.

Subjects/Keywords: nitrate isotopes; Mississippi River; Atchafalaya River; carbon; Nitrogen

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APA (6^th Edition):

BryantMason, A. E. (2012). Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-11112012-181035 ; https://digitalcommons.lsu.edu/gradschool_dissertations/900

Chicago Manual of Style (16^th Edition):

BryantMason, April Elizabeth. “Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River.” 2012. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-11112012-181035 ; https://digitalcommons.lsu.edu/gradschool_dissertations/900.

MLA Handbook (7^th Edition):

BryantMason, April Elizabeth. “Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River.” 2012. Web. 07 Mar 2021.

Vancouver:

BryantMason AE. Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River. [Internet] [Doctoral dissertation]. Louisiana State University; 2012. [cited 2021 Mar 07]. Available from: etd-11112012-181035 ; https://digitalcommons.lsu.edu/gradschool_dissertations/900.

Council of Science Editors:

BryantMason AE. Nitrogen and Carbon Export to the Gulf of Mexico by the Atchafalaya River, a Major Distributary of the Mississippi River. [Doctoral Dissertation]. Louisiana State University; 2012. Available from: etd-11112012-181035 ; https://digitalcommons.lsu.edu/gradschool_dissertations/900

7. Shaw, John Burnham. The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA.

Degree: PhD, Geological Sciences, 2013, University of Texas – Austin

URL: http://hdl.handle.net/2152/25220

► The Wax Lake Delta (WLD) is a sandy, modern river delta prograding rapidly into Atchafalaya Bay. This dissertation uses field data to improve the understanding… (more)

▼ The Wax Lake Delta (WLD) is a sandy, modern river delta prograding rapidly into Atchafalaya Bay. This dissertation uses field data to improve the understanding of channel kinematics that dictate river delta geometry and stratigraphy, while providing a framework for coastal restoration efforts. The studies presented here show that the distributary channel network of the WLD is erosional. In the first study, analyses of the feeder channel to the WLD and the channel network within the sub-aerially emergent delta show that the channel bed has incised into the consolidated muds that act as bedrock. The large (>62%) fraction of bedrock exposure found in multi-beam surveys is related to the under-saturation of suspended sand measured during the flood of 2009. The second study concerns the delta front beyond the emergent delta Distributary channels extend 2 – 6 km into the delta front. Four bathymetric surveys of one bifurcating distributary channel – Gadwall Pass – show that the majority of bed aggradation occurs during floods, but the majority of channel extension of each bifurcate channel occurs during low river discharge. In the third study, field measurements of fluid flow during a tidal cycle indicate that tidal augmentation of during periods of low river discharge is responsible for channel extension during low river discharges. Flow direction measured from streaklines present in aerial photomosaics is combined with bathymetric evolution data to quantify spatial velocity changes on the delta front. These data show that flow spreading is insufficient to prevent acceleration at channel margins, providing an explanation for observed erosion. Flow divergence is limited on the delta front by the proximity of neighboring channels, even though they are separated by 10-30 channel widths. The associated convergence of flow in inter-distributary bays occurs along “drainage troughs”. These channel-forms collect flow that has been dispensed from distributary channel network. Finally, ambient currents in Atchafalaya Bay (0.06 – 0.2 m/s) caused by tides and the proximity to the neighboring Atchafalaya Delta appear to alter flow patterns on the delta foreset, and are responsible for channel curvature on the delta front. Advisors/Committee Members: Mohrig, David (advisor).

Subjects/Keywords: River delta; Sediment; Distributary channels; Progradation; Kinematics; Wax Lake Delta; Louisiana; Atchafalaya Bay

…is prograding in coastal Louisiana. This river delta – the Wax Lake Delta – did not exist… …shows the location of the WLD within the state of Louisiana, with the Mississippi River shown… …in green, the Red River is shown in red, and the Atchafalaya River system is shown in… …Louisiana, USA 2.1. Introduction G.K. Gilbert [1885] defined a river delta as the… …x28;Fig. 2.1). It receives water from the Mississippi River through the Atchafalaya…

10 more images…

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APA (6^th Edition):

Shaw, J. B. (2013). The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/25220

Chicago Manual of Style (16^th Edition):

Shaw, John Burnham. “The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA.” 2013. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/25220.

MLA Handbook (7^th Edition):

Shaw, John Burnham. “The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA.” 2013. Web. 07 Mar 2021.

Vancouver:

Shaw JB. The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/25220.

Council of Science Editors:

Shaw JB. The kinematics of distributary channels on the Wax Lake Delta, coastal Louisiana, USA. [Doctoral Dissertation]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/25220

Louisiana State University

8. DelDuco, Emily. Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana.

Degree: MS, Biogeochemistry, 2017, Louisiana State University

URL: https://digitalcommons.lsu.edu/gradschool_theses/4349

► The quantity and quality of dissolved carbon delivered to coastal margins by rivers is an important component of global carbon cycling. The Atchafalaya River… (more)

▼ The quantity and quality of dissolved carbon delivered to coastal margins by rivers is an important component of global carbon cycling. The Atchafalaya River (AR) discharges ~25% of the flow of the Mississippi River (MR) and the total flow of the Red River (RR) into the Gulf of Mexico (GoM) annually while flowing through the largest bottomland swamp in North America. This provides a unique opportunity to study floodplain impacts on dissolved carbon processes in a large river system. The research aimed to: (1) determine DIC and DOC transport and processing by a river swamp basin under varied seasons and flow conditions, using the AR as a case study; (2) describe how the major tributaries of the AR affect dissolved carbon concentrations and dynamics (3) provide much-needed estimates for export of carbon to the GoM by the AR. From May 2015 -May 2016, I analyzed DOC and DIC concentrations, mass loads, and δ ¹³Cstable isotope composition of waters in the AR’s tributaries, and its origin and outlet locations. The RR contributed the majority of DOC to this system. The MR contributed the majority of DIC. During the study period, the AR exported 5.35 Tg DIC and 2.34 Tg DOC into the GoM. Based on the mass inflow-outflow balance, approximately 0.53 Tg (~10%) of the total DIC exported was produced within the floodplain, while 0.24 Tg (~10%) of DOC entering the basin was removed. All sites were saturated with pCO₂, indicating that this swamp-river system acts a large source of DIC to the atmosphere as well as to coastal margins. Largest downstream changes to concentrations and loads occurred during periods when the adjacent wetlands were deeply inundated. The changes corresponded with shifts in isotopic composition that suggested inputs of DIC from floodplains. This effect was particularly pronounced during early flood stages. This thesis research demonstrates that a major river with extensive floodplains in its coastal margin can act as an important source of DIC and a sink for DOC.

Subjects/Keywords: Atchafalaya River; floodplain; dissolved organic carbon; dissolved inorganic carbon; carbon cycling; wetland

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APA (6^th Edition):

DelDuco, E. (2017). Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana. (Masters Thesis). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_theses/4349

Chicago Manual of Style (16^th Edition):

DelDuco, Emily. “Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana.” 2017. Masters Thesis, Louisiana State University. Accessed March 07, 2021. https://digitalcommons.lsu.edu/gradschool_theses/4349.

MLA Handbook (7^th Edition):

DelDuco, Emily. “Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana.” 2017. Web. 07 Mar 2021.

Vancouver:

DelDuco E. Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2017. [cited 2021 Mar 07]. Available from: https://digitalcommons.lsu.edu/gradschool_theses/4349.

Council of Science Editors:

DelDuco E. Floodplain Impacts on Water Quality: A Case Study In Southern Louisiana. [Masters Thesis]. Louisiana State University; 2017. Available from: https://digitalcommons.lsu.edu/gradschool_theses/4349

University of Southern Mississippi

9. Prouhet, Jeremiah Nicholas. Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana.

Degree: MS, Marine Science, 2011, University of Southern Mississippi

URL: https://aquila.usm.edu/masters_theses/219

► Annual rates of shallow autocompaction (< 1 m) were calculated in the upper ~one meter of sediment from six cores of a transect in… (more)

▼ Annual rates of shallow autocompaction (< 1 m) were calculated in the upper ~one meter of sediment from six cores of a transect in the Pearl River Marsh (PRM), Louisiana, in order to determine the most significant sedimentary property controlling this process. Compaction-free wedge cores were sub-sampled at one centimeter intervals to collect the following data: age control, using 137Cs and 210Pb, and sedimentary variables, specifically, particulate organic carbon, bulk density, median grain size, porosity, and water content. An upper and an underlying sedimentary unit (named the 137Cs and 210Pb units) were defined between radiometric datum levels, and their sedimentary properties were statistically tested for significant differences using the non-parametric Mann-Whitney test. Rates of autocompaction were calculated from the model of Williams (2003), and both rates of autocompaction and sedimentation were tested for significant differences between the upper and lower sedimentary units. The upper unit in the six cores generally had lower bulk density, higher water content, higher porosity, and higher particulate organic carbon than the underlying unit, but with some interesting exceptions. Additionally, annual autocompaction and sedimentation rates were greatest in the overlying unit at stations PR02 (0.39 ± 0.05 cm/y) and PR05 (0.42 ± 0.03 cm/y) and greatest in the underlying unit at stations PR02 (0.22 ± 0.08 cm/y) and PR03 (0.18 ± 0.06 cm/y). Based on Spearman correlations, rates of autocompaction were most strongly correlated to and influenced by rates of sedimentation rather than the other sedimentary variables: particulate organic carbon, bulk density, median grain size, porosity, and water content. The rates of sedimentation and autocompaction from this study were similar to rates measured in similar studies that use different methodologies to calculate compaction. This study demonstrates that rates of autocompaction are highly variable in near-surface sediments and that these rates significantly decrease with increased depth. Advisors/Committee Members: Kevin Yeager, Charlotte Brunner, Mark Kulp.

Subjects/Keywords: Pearl River Marsh; Louisiana; sediment; Marine Biology

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APA (6^th Edition):

Prouhet, J. N. (2011). Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana. (Masters Thesis). University of Southern Mississippi. Retrieved from https://aquila.usm.edu/masters_theses/219

Chicago Manual of Style (16^th Edition):

Prouhet, Jeremiah Nicholas. “Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana.” 2011. Masters Thesis, University of Southern Mississippi. Accessed March 07, 2021. https://aquila.usm.edu/masters_theses/219.

MLA Handbook (7^th Edition):

Prouhet, Jeremiah Nicholas. “Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana.” 2011. Web. 07 Mar 2021.

Vancouver:

Prouhet JN. Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana. [Internet] [Masters thesis]. University of Southern Mississippi; 2011. [cited 2021 Mar 07]. Available from: https://aquila.usm.edu/masters_theses/219.

Council of Science Editors:

Prouhet JN. Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana. [Masters Thesis]. University of Southern Mississippi; 2011. Available from: https://aquila.usm.edu/masters_theses/219

Louisiana State University

10. Feng, Zhixuan. Hydrodynamic response to cold fronts along the Louisiana coast.

Degree: MS, Oceanography and Atmospheric Sciences and Meteorology, 2009, Louisiana State University

URL: etd-06102009-153456 ; https://digitalcommons.lsu.edu/gradschool_theses/3221

► Cold fronts play important roles in flushing water out of the Louisiana estuaries. This study is aimed at examining the impact of cold front passages… (more)

▼ Cold fronts play important roles in flushing water out of the Louisiana estuaries. This study is aimed at examining the impact of cold front passages on the hydrodynamics in autumn-winter-spring of 2006-2007, and tries to determine the geographic difference, correlation and relative importance of winds, tides, and river discharge on water level variability and flow field. The amplitude spectra of water level reveal that diurnal tides dominate most stations. Areas west of 91°W have relatively high semidiurnal tides. The subtidal fluctuations are mainly wind-driven. Only the station in the Atchafalaya River shows obvious response to the spring flood of the Mississippi/Atchafalaya Rivers. Coastal bays have different water exchange rates depending on their water body area and geomorphology. Five largest flushing events correspond to migrating extratropical cyclones with frontal orientation perpendicular to the coastline, suggesting that wind direction is one of the controlling factors in the flushing rate and total transport. Both alongshore and cross-shore winds may effectively induce bay-shelf exchange. Northwest/north winds appear to be the most effective wind forcing in driving water movement from bay to shelf. Strong cold fronts may flush more than 40% of the bay waters onto the shelf within a period less than 40 hours. The near-surface current on the Louisiana inner shelf is mainly wind-driven, but tidal forcing becomes more important in the sub-surface layers or in the vicinity of the coastline of shallow waters. A prevailing down-coast flow occurs 81% and 70% of the time at CSI-6 and CSI-3, respectively. Strong cold front events may disturb this down-coast flow system by inducing a 1- to 3-day up-coast flow. At CSI-6, the Mississippi river discharge has little influence in non-flood seasons. During the period of spring flood, however, the large amount of freshwater exerts significant barotropic and baroclinic forcings on the current field and reinforces the down-coast flow. The analytical model reveals that the amplitudes of water level variations induced by alongshore and cross-shore wind forcings have the same order of magnitude (i.e., 10-1 m), indicating that they play almost equally important roles in driving the subtidal water level variability inside the bays.

Subjects/Keywords: cold fronts; Mississippi and Atchafalaya River discharge; subtidal wind-driven oscillations; bay-shelf exchange; alongshore and cross-shore wind forcings; down-coast westward flow; Louisiana estuaries and inner continental shelf

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APA (6^th Edition):

Feng, Z. (2009). Hydrodynamic response to cold fronts along the Louisiana coast. (Masters Thesis). Louisiana State University. Retrieved from etd-06102009-153456 ; https://digitalcommons.lsu.edu/gradschool_theses/3221

Chicago Manual of Style (16^th Edition):

Feng, Zhixuan. “Hydrodynamic response to cold fronts along the Louisiana coast.” 2009. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-06102009-153456 ; https://digitalcommons.lsu.edu/gradschool_theses/3221.

MLA Handbook (7^th Edition):

Feng, Zhixuan. “Hydrodynamic response to cold fronts along the Louisiana coast.” 2009. Web. 07 Mar 2021.

Vancouver:

Feng Z. Hydrodynamic response to cold fronts along the Louisiana coast. [Internet] [Masters thesis]. Louisiana State University; 2009. [cited 2021 Mar 07]. Available from: etd-06102009-153456 ; https://digitalcommons.lsu.edu/gradschool_theses/3221.

Council of Science Editors:

Feng Z. Hydrodynamic response to cold fronts along the Louisiana coast. [Masters Thesis]. Louisiana State University; 2009. Available from: etd-06102009-153456 ; https://digitalcommons.lsu.edu/gradschool_theses/3221

University of Arkansas

11. McCain, Gordon William. Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River.

Degree: MS, 2016, University of Arkansas

URL: https://scholarworks.uark.edu/etd/1559

► In 1950, the U.S. Army Corps of Engineers (USACE) reported a rapid increase of water discharge from the Mississippi River to its distributary channel;… (more)

Subjects/Keywords: Earth sciences; Atchafalaya river; Bifurcation; Channel avulsion; Dredging; Mississippi delta; One-dimensional flow model; Geology; Geomorphology; Hydrology

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APA (6^th Edition):

McCain, G. W. (2016). Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River. (Masters Thesis). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/1559

Chicago Manual of Style (16^th Edition):

McCain, Gordon William. “Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River.” 2016. Masters Thesis, University of Arkansas. Accessed March 07, 2021. https://scholarworks.uark.edu/etd/1559.

MLA Handbook (7^th Edition):

McCain, Gordon William. “Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River.” 2016. Web. 07 Mar 2021.

Vancouver:

McCain GW. Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River. [Internet] [Masters thesis]. University of Arkansas; 2016. [cited 2021 Mar 07]. Available from: https://scholarworks.uark.edu/etd/1559.

Council of Science Editors:

McCain GW. Influences of Channel Dredging on Avulsion Potential at the Atchafalaya River. [Masters Thesis]. University of Arkansas; 2016. Available from: https://scholarworks.uark.edu/etd/1559

Louisiana State University

12. DuMars, Anton J. Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana.

Degree: MS, Earth Sciences, 2002, Louisiana State University

URL: etd-1112102-201553 ; https://digitalcommons.lsu.edu/gradschool_theses/1856

► The Mississippi River has undergone at least seven cyclic avulsions during the Holocene epoch. The latest avulsion, down the Atchafalaya River into the Gulf of… (more)

▼ The Mississippi River has undergone at least seven cyclic avulsions during the Holocene epoch. The latest avulsion, down the Atchafalaya River into the Gulf of Mexico, has produced two bayhead deltas prograding into Atchafalaya Bay. The Wax Lake Delta, typical of other Mississippi sub-deltas, has a natural anastomosing channel pattern. In contrast, the Atchafalaya Delta, situated in the eastern side of the Bay, has experienced sporadic and limited growth due to the dredging of a navigation channel below natural depth. Channel bifurcation, and sediment transport processes and responses, were investigated in the Wax Lake Delta, using channel flow velocities, suspended sediment concentrations, cross-channel bottom profiles, and short push-core stratigraphy during flood and non-flood conditions. Center channel flow velocities averaged 2 to 2 1/2 times higher during flood conditions than during non-flood conditions. Velocities maintained near constant values from proximal to distal, then decreased near distributary channel mouths. Cross-channel flow velocities reached a maximum above the thalweg. During non-flood conditions, flow velocities, inversely proportional to tidal fluctuations, were greatly reduced during strong southerly winds; however, tidal and wind influences were negated by flood condition flow velocities. Homogeneous suspended sediment concentrations of coarse silt to very fine sand (mean grain size) were found throughout the system, indicating well-mixed, turbulent flow. Suspended sediment concentrations were up to 20 times higher during flood than during non-flood conditions. Most calculated boundary shear stresses were greater than critical boundary shear stresses, indicating little deposition was occurring in distributary channels during sample collection. Bedload sediment size remained near constant throughout the system in all samples from proximal to distal end, indicate sediment moves efficiently through the deltaic system with very little grain size fractionation in suspended or bedload sediments. Downstream sediment fluxes vary directly with velocity. Thus, the thalweg transports the highest volume of sediment per unit time even though the sediment concentrations per unit volume are homogeneous. Sediment deposition per unit time is greatest at the distributary mouth channel thalweg, where velocities slow, creating a distributary mouth bar and subsequent channel bifurcation. This process has been termed sediment flux controlled deposition.

Subjects/Keywords: sediment flux; atchafalaya; mississippi river; bifurcate; delta

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APA (6^th Edition):

DuMars, A. J. (2002). Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-1112102-201553 ; https://digitalcommons.lsu.edu/gradschool_theses/1856

Chicago Manual of Style (16^th Edition):

DuMars, Anton J. “Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana.” 2002. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-1112102-201553 ; https://digitalcommons.lsu.edu/gradschool_theses/1856.

MLA Handbook (7^th Edition):

DuMars, Anton J. “Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana.” 2002. Web. 07 Mar 2021.

Vancouver:

DuMars AJ. Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2002. [cited 2021 Mar 07]. Available from: etd-1112102-201553 ; https://digitalcommons.lsu.edu/gradschool_theses/1856.

Council of Science Editors:

DuMars AJ. Distributary mouth bar formation and channel bifurcation in the Wax Lake Delta, Atchafalaya Bay, Louisiana. [Masters Thesis]. Louisiana State University; 2002. Available from: etd-1112102-201553 ; https://digitalcommons.lsu.edu/gradschool_theses/1856

Louisiana State University

13. Halloran, B. Thorpe. Early life history dynamics of the fish community in the Atchafalaya River Basin.

Degree: PhD, Environmental Sciences, 2010, Louisiana State University

URL: etd-07082010-162705 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1781

► Seasonal overbank flooding in systems like the Atchafalaya River Basin (ARB) provides the opportunity for fishes in the mainstem to access off-channel areas on the… (more)

▼ Seasonal overbank flooding in systems like the Atchafalaya River Basin (ARB) provides the opportunity for fishes in the mainstem to access off-channel areas on the floodplain. Typically, newly inundated floodplain habitats allow adult fishes to add biomass, avoid predation, and potentially, to reproduce. However, in systems like the ARB, the timing, duration, and magnitude of flooding infrequently coincides with known reproductive periods of many fishes assumed to be floodplain-dependent. To quantify the level of floodplain-exploitative fish reproduction in the ARB, I collected larval and juvenile fish with a variety of sampling gear that allowed estimates in both ultra-shallow (< 2-m) and continuously-inundated habitats (headwater lakes, canals, and bayous). A suite of water quality parameters, river stage, flow, and hours of daylight were used to gauge the influence of environmental phenomena on age-0 abundance during both inundation and drawdown. The results of the 19-month study suggest that many taxa do not rely on the floodplain to ensure high survivorship. Interestingly, the reproductive ecologies of many ARB fishes appeared to be largely independent of widespread connectivity. Although an increasing hydrograph appeared to enhance reproductive output, the interannual timing and intensity of spawning showed limited variability. Larval densities were also contrasted with the microcrustacean zooplankton (copepods and cladocerans) population to assess if a potential food limitation existed in the weeks and months following hatching. During the study, increased zooplankter abundance was typically preceded by elevated river-floodplain connectivity. Conversely, as floodwaters receded during the summer, zooplankton abundance declined to lowest levels observed during the study. Overall, there was limited synchronous overlap between the hatchlings of most fish taxa and their zooplankter prey. This could have potentially resulted in starvation and reduced annual recruitment. Yet, my analysis of the factors that regulate larval fish abundance in the ARB suggest that the density of zooplankton was highly significant although high numbers of larvae and zooplankton rarely coincided. Finally, I compared the intraday (morning vs. afternoon) density and mean length of larval fish at fixed sample sites. The results suggest that once-daily ichthyoplankton collections may fail to provide accurate density and length measurements for young fish populations.

Subjects/Keywords: zooplankton; Atchafalaya River Basin; floodplain; flood pulse; ichthyoplankton

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APA (6^th Edition):

Halloran, B. T. (2010). Early life history dynamics of the fish community in the Atchafalaya River Basin. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-07082010-162705 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1781

Chicago Manual of Style (16^th Edition):

Halloran, B Thorpe. “Early life history dynamics of the fish community in the Atchafalaya River Basin.” 2010. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-07082010-162705 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1781.

MLA Handbook (7^th Edition):

Halloran, B Thorpe. “Early life history dynamics of the fish community in the Atchafalaya River Basin.” 2010. Web. 07 Mar 2021.

Vancouver:

Halloran BT. Early life history dynamics of the fish community in the Atchafalaya River Basin. [Internet] [Doctoral dissertation]. Louisiana State University; 2010. [cited 2021 Mar 07]. Available from: etd-07082010-162705 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1781.

Council of Science Editors:

Halloran BT. Early life history dynamics of the fish community in the Atchafalaya River Basin. [Doctoral Dissertation]. Louisiana State University; 2010. Available from: etd-07082010-162705 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1781

Louisiana State University

14. Coffman, Mitchell W. The Atchafalaya Basin proposal for nomination to the World Heritage Site list.

Degree: MLA, Landscape Architecture, 2004, Louisiana State University

URL: etd-11092004-193914 ; https://digitalcommons.lsu.edu/gradschool_theses/64

► The Atchafalaya Basin in the Southern United States is a cultural, environmental, historical and natural land region of such universal importance, designation as a World… (more)

Subjects/Keywords: louisiana; world heritage site; atchafalaya basin; world heritage convention; unesco

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APA (6^th Edition):

Coffman, M. W. (2004). The Atchafalaya Basin proposal for nomination to the World Heritage Site list. (Masters Thesis). Louisiana State University. Retrieved from etd-11092004-193914 ; https://digitalcommons.lsu.edu/gradschool_theses/64

Chicago Manual of Style (16^th Edition):

Coffman, Mitchell W. “The Atchafalaya Basin proposal for nomination to the World Heritage Site list.” 2004. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-11092004-193914 ; https://digitalcommons.lsu.edu/gradschool_theses/64.

MLA Handbook (7^th Edition):

Coffman, Mitchell W. “The Atchafalaya Basin proposal for nomination to the World Heritage Site list.” 2004. Web. 07 Mar 2021.

Vancouver:

Coffman MW. The Atchafalaya Basin proposal for nomination to the World Heritage Site list. [Internet] [Masters thesis]. Louisiana State University; 2004. [cited 2021 Mar 07]. Available from: etd-11092004-193914 ; https://digitalcommons.lsu.edu/gradschool_theses/64.

Council of Science Editors:

Coffman MW. The Atchafalaya Basin proposal for nomination to the World Heritage Site list. [Masters Thesis]. Louisiana State University; 2004. Available from: etd-11092004-193914 ; https://digitalcommons.lsu.edu/gradschool_theses/64

University of Texas – Austin

15. Ramirez, Michael Towler. Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana.

Degree: MSin Geological Sciences, Geological Sciences, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-12-4710

► Understanding specific pathways for sand transport in the lower reaches of large rivers, particularly the Mississippi, is the key to addressing multiple significant geologic problems… (more)

▼ Understanding specific pathways for sand transport in the lower reaches of large rivers, particularly the Mississippi, is the key to addressing multiple significant geologic problems and for environmental restoration efforts. Field studies were performed in the Mississippi River 75-100 km upstream of the Gulf of Mexico outlet in April 2010 (water discharge: 23,000 m³ s⁻¹), May 2010 (18,500-20,500 m³ s⁻¹), and March 2011 (27,000 m³ s⁻¹) to examine sediment transport phenomena in the river channel. Methods comprised multibeam sonar bathymetric surveys, acoustic Doppler current profiler measurements of current velocity and acoustic backscatter, point-integrated isokinetic suspended sediment sampling, and channel-bed grab sampling. Channel morphology surveys revealed a 30-60 m deep thalweg, alternating between banks every 2-3 km, opposite bedform-covered lateral sand bars. Dune sizes nearest the thalweg ranged from 7 m wavelength and 0.3 m height to over 100 m wavelength and 2.3 m height as a function of water discharge, with decreasing dune sizes towards shallow water. Material comprising the dunes was well-sorted, 125-500 [mu]m sand. Bedload transport rates increased exponentially with water discharge in April 2010 and March 2011 comparable to previous studies in this reach, though rates in May 2011 were well below predicted values for a site (Myrtle Grove) immediately downriver of a sand-mining project. Average water velocities ranged from 1.3 m s⁻¹ in May 2010 to 2 m s⁻¹ in March 2011. Skin-friction shear stress increased with water discharge, but varied over an order of magnitude at all measured discharges. Suspended sand concentration and grain size increased with proximity to the bed during all study periods, and was most pronounced in March 2011. Suspended sand concentrations were greatest over the center of lateral bars, and lowest in the thalweg, indicating that sand transport downstream occurs primarily over lateral sand bars where there is a combination of high shear stress and available bed material. Total bed-material discharge increased exponentially with water discharge. Bedform-induced turbulence may be responsible for the bed material suspension. These results are relevant to coastal restoration efforts by river diversion which seek to distribute sand from the upper water column to deltaic interdistributary wetlands. Advisors/Committee Members: Allison, Mead A. (Mead Ashton) (advisor), Kim, Wonsuck (committee member), Mohrig, David (committee member).

Subjects/Keywords: Mississippi River; Louisiana; Sediment; Sand; Mud; Fluvial; River; Sediment transport; Turbulence; Lateral sand bars

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APA (6^th Edition):

Ramirez, M. T. (2011). Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-12-4710

Chicago Manual of Style (16^th Edition):

Ramirez, Michael Towler. “Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2011-12-4710.

MLA Handbook (7^th Edition):

Ramirez, Michael Towler. “Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana.” 2011. Web. 07 Mar 2021.

Vancouver:

Ramirez MT. Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4710.

Council of Science Editors:

Ramirez MT. Suspension of bed material over lateral sand bars in the Lower Mississippi River, Southeastern Louisiana. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4710

Louisiana State University

16. Yao, Qiang. Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida.

Degree: PhD, Oceanography and Atmospheric Sciences and Meteorology, 2015, Louisiana State University

URL: etd-04052015-173634 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1754

► This dissertation examines the paleoecological records from the Shark River Estuary in the southwestern part of the Everglades National Park (ENP), Florida, with primary goal… (more)

▼ This dissertation examines the paleoecological records from the Shark River Estuary in the southwestern part of the Everglades National Park (ENP), Florida, with primary goal of reconstructing the Holocene history of the coastal mangrove ecosystem in the Florida Coastal Everglades. Roughly 15 meters of sediments were collected from 4 study sites and subjected to loss-on ignition, palynological, and X-ray fluorescence analyses. According to the literature, the earliest communities of Rhizophora mangle (red mangrove) occurred prior to 8,000 cal yr BP in the south-central area of the Belize Barrier Reef Platform. Between 7,000 and 5,000 cal yr BP, Rhizophora was established in the Caribbean coast of South America and Central America. With warmer winter sea-surface temperature and a decreased rate of sea-level rise between 5,000 and 3,000 cal yr BP, Rhizophora eventually colonized the coastlines of the Yucatan, South Florida, and Bermuda. Statistical analysis of 25 modern pollen spectra from the Everglades National Park shows that different wetland sub-environments in the Everglades can be identified based on their palynological signature. Accordingly, palynological data from sediment cores can be used to accurately reconstruct past wetland responses to a variety of environmental and climatic changes in the Everglades. Multi-proxy analyses of sediment cores from four study sites along the Shark River Estuary reveal that the mid-Holocene sea-level rise is the dominant cause of vegetation change. The Shark River Estuary underwent three major transformations during the last six millennia: (1) Short-hydroperiod marl prairies were progressively replaced by long hydroperiod prairies and sloughs from ¡5,700 to 3,800 cal yr BP. (2) Long hydroperiod prairies and sloughs were replaced by brackish marsh from 3,800 to 2,000 cal yr BP. (3) A significant expansion of mangroves occurred over the last 2,000 years. In addition to Hurricane Wilma in 2005, the southwestern Everglades were directly impacted by at least six major hurricanes at ~3,000, 1,700, 950, 580, 350, and 120 cal yr BP. At ~1,100 cal yr BP, as the shoreline became stabilized, a mixed mangrove forest was formed at the mouth of the Shark River.

Subjects/Keywords: Shark River Estuary; Florida; mangroves; Everglades; wetlands; pollen

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APA (6^th Edition):

Yao, Q. (2015). Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-04052015-173634 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1754

Chicago Manual of Style (16^th Edition):

Yao, Qiang. “Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida.” 2015. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-04052015-173634 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1754.

MLA Handbook (7^th Edition):

Yao, Qiang. “Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida.” 2015. Web. 07 Mar 2021.

Vancouver:

Yao Q. Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida. [Internet] [Doctoral dissertation]. Louisiana State University; 2015. [cited 2021 Mar 07]. Available from: etd-04052015-173634 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1754.

Council of Science Editors:

Yao Q. Holecene Paleoenvironmental Reconstruction from the Shark River Estuary, Everglades, Florida. [Doctoral Dissertation]. Louisiana State University; 2015. Available from: etd-04052015-173634 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1754

Louisiana State University

17. Walley, Rachel Cathleen. Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A.

Degree: MS, Environmental Sciences, 2007, Louisiana State University

URL: etd-11132007-111128 ; https://digitalcommons.lsu.edu/gradschool_theses/2931

► Over the last century, the aquatic macrophyte community of the Atchafalaya River Basin (ARB) has become increasingly dominated by invasive species. I used digital photography… (more)

▼ Over the last century, the aquatic macrophyte community of the Atchafalaya River Basin (ARB) has become increasingly dominated by invasive species. I used digital photography and GIS software to determine ARB macrophyte community composition by measuring percent cover of each plant species within five 0.25-m2 quadrats sampled from 108 sites in 2005 and 103 sites in 2006. Macrophyte community data and measurements of soil and water physicochemistry at each site were used to investigate environmental associations of the macrophytes inhabiting bayou, lake, excavated canal, and swamp habitats. Analyses indicated substantial differences in physicochemical conditions among habitats, but none of the 20 macrophyte species collected during the study exhibited consistent preferences for specific habitat types. Percent coverage of invasive plants was greater than native plants across all habitat types in both years, with invasive plant richness increasing in 2006 with the arrival of giant salvinia (Salvinia molesta). Common salvinia (Salvinia minima) appeared to have the greatest impact on the native plants, exhibiting inverse abundance relationships with six of fourteen species (43%). Comparisons of slopes from areal coverage â€“ dry weight regressions based on macrophytes that were photographed, collected, and dried from quadrats sampled at 26 sites in 2006 suggested that invasive species accumulated more biomass per unit area than ecologically similar native taxa. In both years, terrestrial plants were observed in association with floating mats of other macrophyte species, apparently taking advantage of the mats as â€œterrestrialâ€ substrate. Submerged plants exhibited few significant differences in abundance among the four habitats, although they did tend to occur where floating plants were not abundant. There were few physicochemical differences among vegetated and non-vegetated sites for native or invasive plants, although pH was lower at vegetated sites (versus non-vegetated) for both native (2005) and invasive (2005 and 2006) plants. Canonical discriminate function analysis revealed substantial changes in plant community composition and physicochemistry between the two years at approximately 25% of the study locations. These changes highlight the dynamic nature of the littoral zone and the multiplicity of deterministic and stochastic factors that likely affect the composition of the resident macrophyte community in the ARB.

Subjects/Keywords: Atchafalaya River Basin; aquatic macrophytes; invasive plants; aquatic plant communities

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APA (6^th Edition):

Walley, R. C. (2007). Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A. (Masters Thesis). Louisiana State University. Retrieved from etd-11132007-111128 ; https://digitalcommons.lsu.edu/gradschool_theses/2931

Chicago Manual of Style (16^th Edition):

Walley, Rachel Cathleen. “Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A.” 2007. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-11132007-111128 ; https://digitalcommons.lsu.edu/gradschool_theses/2931.

MLA Handbook (7^th Edition):

Walley, Rachel Cathleen. “Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A.” 2007. Web. 07 Mar 2021.

Vancouver:

Walley RC. Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A. [Internet] [Masters thesis]. Louisiana State University; 2007. [cited 2021 Mar 07]. Available from: etd-11132007-111128 ; https://digitalcommons.lsu.edu/gradschool_theses/2931.

Council of Science Editors:

Walley RC. Environmental factors affecting the distribution of native and invasive aquatic plants in the Atchafalaya River Basin, Louisiana, U.S.A. [Masters Thesis]. Louisiana State University; 2007. Available from: etd-11132007-111128 ; https://digitalcommons.lsu.edu/gradschool_theses/2931

Louisiana State University

18. Zimmerman, Amanda Jo. Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana.

Degree: MS, Earth Sciences, 2010, Louisiana State University

URL: etd-08272010-092510 ; https://digitalcommons.lsu.edu/gradschool_theses/981

► In coastal Louisiana it is common to use dredge spoil to build marshland that has been lost due to a variety of factors. Under various… (more)

Subjects/Keywords: dredge; metals; sequential; extraction; SEP; Atchafalaya; Houma; Southwest Pass; Louisiana; heavy; spoil; disturbed sediment; undisturbed sediment

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APA (6^th Edition):

Zimmerman, A. J. (2010). Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-08272010-092510 ; https://digitalcommons.lsu.edu/gradschool_theses/981

Chicago Manual of Style (16^th Edition):

Zimmerman, Amanda Jo. “Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana.” 2010. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-08272010-092510 ; https://digitalcommons.lsu.edu/gradschool_theses/981.

MLA Handbook (7^th Edition):

Zimmerman, Amanda Jo. “Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana.” 2010. Web. 07 Mar 2021.

Vancouver:

Zimmerman AJ. Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2010. [cited 2021 Mar 07]. Available from: etd-08272010-092510 ; https://digitalcommons.lsu.edu/gradschool_theses/981.

Council of Science Editors:

Zimmerman AJ. Speciation of heavy metals in disturbed and undisturbed sediments from Atchafalaya Bay, Houma Navigation Canal, and Southwest Pass, Louisiana. [Masters Thesis]. Louisiana State University; 2010. Available from: etd-08272010-092510 ; https://digitalcommons.lsu.edu/gradschool_theses/981

East Carolina University

19. Young, David R. Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf.

Degree: MS, Geology, 2014, East Carolina University

URL: http://hdl.handle.net/10342/4532

► Floods can dramatically increase the sediment load supplied to continental margins, leading to greater and potentially geochemically unique deposition. The 2011 flooding of the Mississippi… (more)

▼ Floods can dramatically increase the sediment load supplied to continental margins, leading to greater and potentially geochemically unique deposition. The 2011 flooding of the Mississippi River and its discharge into coastal areas of the northern Gulf of Mexico provided an opportunity to examine how a large flood was received on the seabed along the adjacent continental margin and influenced stratigraphic development. This was a geologically significant flood that occurred from May to July, 2011, surpassing historic water levels at Vicksburg, MS and necessitating the opening of the Morganza Spillway for the first time in 37 years. For this study, the stratigraphic and geochemical nature of the deposition associated with this event was evaluated using multi-cores collected at 68 sites along the Louisiana shelf. Cores were examined using x-radiography, particle reactive radioisotopes, Â²Â³â�´Th and â�·Be, as well as analysis of grain-size distributions and organic matter content. Inventories of â�·Be from post-flood cores varied across the shelf, ranging from 0 to 7 dpm/cmÂ². Greatest â�·Be values were seen where deposits appeared thickest in x-radiography and were located down-drift of the Mississippi and Atchafalaya River mouths. Near the Mississippi River, the highest inventories were 10-15 km seaward of the river mouth and at water depths of 25-75 m. Near the Atchafalaya River, the highest inventories were farther from the river mouth (~130 km), and on the inner shelf at depths of 5-30 m. Based on geochemical and sedimentological data, the 2011 flood deposit reached up to 8 cm thick. Flood deposit sediments showed a higher percentage of clays and lower dry bulk densities compared to pre-2011 deposited material, making the flood deposit relatively sedimentologically and stratigraphically distinct on the shelf. An estimated flood sediment budget suggests that the flood deposited approximately 80 Â± 30 Mt (million tons) of sediment on the shelf during a three month span, which accounts for 47 Â± 17% of the average annual sediment load of the Mississippi River, but is much less than the shelf sediments remobilized by Hurricanes Katrina and Rita in 2005 (1200 Mt). Physical oceanographic and fluvial conditions, and shelf morphology significantly influenced the spatial distribution and magnitude of flood sedimentation strata. This research demonstrates the identification and interpretation of flood sequences and provides further insight on the source, deposition, and transport of terrestrially-derived material on the Louisiana shelf. Advisors/Committee Members: Corbett, D. Reide (advisor).

Subjects/Keywords: Geology; Marine geology; Geochemistry; Flood deposits; Mississippi River; Radioisotopes; Sedimentation; Sediment transport; Sedimentation and deposition – Research – Louisiana; Floods – Mississippi River – 2011; Continental shelf – Louisiana

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APA (6^th Edition):

Young, D. R. (2014). Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf. (Masters Thesis). East Carolina University. Retrieved from http://hdl.handle.net/10342/4532

Chicago Manual of Style (16^th Edition):

Young, David R. “Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf.” 2014. Masters Thesis, East Carolina University. Accessed March 07, 2021. http://hdl.handle.net/10342/4532.

MLA Handbook (7^th Edition):

Young, David R. “Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf.” 2014. Web. 07 Mar 2021.

Vancouver:

Young DR. Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf. [Internet] [Masters thesis]. East Carolina University; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10342/4532.

Council of Science Editors:

Young DR. Examination of the 2011 Mississippi River Flood Deposit on the Louisiana Continental Shelf. [Masters Thesis]. East Carolina University; 2014. Available from: http://hdl.handle.net/10342/4532

Louisiana State University

20. Hooper, Mauricio. Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River.

Degree: PhD, Hydraulic Engineering, 2019, Louisiana State University

URL: https://digitalcommons.lsu.edu/gradschool_dissertations/4869

► The Lower Mississippi River Physical Model (LMRPM), housed at the LSU Center for River Studies on the Baton Rouge, LA Water Campus, is a… (more)

Subjects/Keywords: Baton Rouge; Louisiana; Center for River Studies; Coastal Protection and Restoration Authority

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APA (6^th Edition):

Hooper, M. (2019). Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River. (Doctoral Dissertation). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_dissertations/4869

Chicago Manual of Style (16^th Edition):

Hooper, Mauricio. “Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River.” 2019. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. https://digitalcommons.lsu.edu/gradschool_dissertations/4869.

MLA Handbook (7^th Edition):

Hooper, Mauricio. “Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River.” 2019. Web. 07 Mar 2021.

Vancouver:

Hooper M. Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River. [Internet] [Doctoral dissertation]. Louisiana State University; 2019. [cited 2021 Mar 07]. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/4869.

Council of Science Editors:

Hooper M. Quantitative Evaluation of a Lightweight Sediment for a Physical Model of the Lower Mississippi River. [Doctoral Dissertation]. Louisiana State University; 2019. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/4869

Louisiana State University

21. Crouch, Russell Ryan. Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf.

Degree: MS, Earth Sciences, 2010, Louisiana State University

URL: etd-11162010-175412 ; https://digitalcommons.lsu.edu/gradschool_theses/1913

► Forty sediment samples taken from twenty-six vibracores collected from Holocene shoals (Tiger and Trinity) were processed for palynomorphs and analyzed to characterize the terrestrial and… (more)

Subjects/Keywords: Louisiana; Holocene; Mississippi River; Delta; Palynology

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APA (6^th Edition):

Crouch, R. R. (2010). Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf. (Masters Thesis). Louisiana State University. Retrieved from etd-11162010-175412 ; https://digitalcommons.lsu.edu/gradschool_theses/1913

Chicago Manual of Style (16^th Edition):

Crouch, Russell Ryan. “Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf.” 2010. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-11162010-175412 ; https://digitalcommons.lsu.edu/gradschool_theses/1913.

MLA Handbook (7^th Edition):

Crouch, Russell Ryan. “Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf.” 2010. Web. 07 Mar 2021.

Vancouver:

Crouch RR. Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf. [Internet] [Masters thesis]. Louisiana State University; 2010. [cited 2021 Mar 07]. Available from: etd-11162010-175412 ; https://digitalcommons.lsu.edu/gradschool_theses/1913.

Council of Science Editors:

Crouch RR. Palynological analysis of Tiger and Trinity Shoals, Louisiana continental shelf. [Masters Thesis]. Louisiana State University; 2010. Available from: etd-11162010-175412 ; https://digitalcommons.lsu.edu/gradschool_theses/1913

Universiteit Utrecht

22. Geurts, A.H. Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system.

Degree: 2011, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/207743

► In the downstream part of the lower Rhine valley, Germany, at least four floodplain levels of pre-Holocene age can be distinguished, based on plan view… (more)

Subjects/Keywords: Geowetenschappen; Rhine, Weichselian, Holocene, climate, glacio-isostasy, river, fluvial, floodplain, vegetation, pollen

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APA (6^th Edition):

Geurts, A. H. (2011). Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/207743

Chicago Manual of Style (16^th Edition):

Geurts, A H. “Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system.” 2011. Masters Thesis, Universiteit Utrecht. Accessed March 07, 2021. http://dspace.library.uu.nl:8080/handle/1874/207743.

MLA Handbook (7^th Edition):

Geurts, A H. “Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system.” 2011. Web. 07 Mar 2021.

Vancouver:

Geurts AH. Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system. [Internet] [Masters thesis]. Universiteit Utrecht; 2011. [cited 2021 Mar 07]. Available from: http://dspace.library.uu.nl:8080/handle/1874/207743.

Council of Science Editors:

Geurts AH. Weichselian to Early Holocene vegetation development and fluvial adjustment in the Lower Rhine Valley, Germany - The role of climate change, glacio-isostasy and intrinsic characteristics of the river system. [Masters Thesis]. Universiteit Utrecht; 2011. Available from: http://dspace.library.uu.nl:8080/handle/1874/207743

Louisiana State University

23. Caillouet, Brendan. Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta.

Degree: MS, Environmental Sciences, 2015, Louisiana State University

URL: etd-05162015-201418 ; https://digitalcommons.lsu.edu/gradschool_theses/4100

► The Atchafalaya River Delta system along with the Wax Lake Outlet Delta and the Mississippi River Delta are the only three areas in Louisiana where… (more)

Subjects/Keywords: mottled duck; atchafalaya; atchafalaya delta; nest success; dredge spoil

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APA (6^th Edition):

Caillouet, B. (2015). Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta. (Masters Thesis). Louisiana State University. Retrieved from etd-05162015-201418 ; https://digitalcommons.lsu.edu/gradschool_theses/4100

Chicago Manual of Style (16^th Edition):

Caillouet, Brendan. “Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta.” 2015. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-05162015-201418 ; https://digitalcommons.lsu.edu/gradschool_theses/4100.

MLA Handbook (7^th Edition):

Caillouet, Brendan. “Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta.” 2015. Web. 07 Mar 2021.

Vancouver:

Caillouet B. Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta. [Internet] [Masters thesis]. Louisiana State University; 2015. [cited 2021 Mar 07]. Available from: etd-05162015-201418 ; https://digitalcommons.lsu.edu/gradschool_theses/4100.

Council of Science Editors:

Caillouet B. Factors Influencing Mottled Duck Nest Success on the Atchafalaya River Delta. [Masters Thesis]. Louisiana State University; 2015. Available from: etd-05162015-201418 ; https://digitalcommons.lsu.edu/gradschool_theses/4100

Louisiana State University

24. Sanders, Hannah March Campbell. Trials & tributaries: myth and disaster in southern Louisiana.

Degree: MFA, Fine Arts, 2011, Louisiana State University

URL: etd-05202011-154316 ; https://digitalcommons.lsu.edu/gradschool_theses/2404

► Trials and Tributaries examines recent disasters occurring in southern Louisiana, interpreted through the Greek myths The Twelve Labors of Herakles. Mankind’s false sense of… (more)

Subjects/Keywords: southern Louisiana; Mississippi River; disaster; mythology; Greek mythology; Louisiana; hybrid; printmaking; relief; woodcut; Herakles; pelican; black bear; oil spill; hurricane; education funding; budget cuts

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APA (6^th Edition):

Sanders, H. M. C. (2011). Trials & tributaries: myth and disaster in southern Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-05202011-154316 ; https://digitalcommons.lsu.edu/gradschool_theses/2404

Chicago Manual of Style (16^th Edition):

Sanders, Hannah March Campbell. “Trials & tributaries: myth and disaster in southern Louisiana.” 2011. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-05202011-154316 ; https://digitalcommons.lsu.edu/gradschool_theses/2404.

MLA Handbook (7^th Edition):

Sanders, Hannah March Campbell. “Trials & tributaries: myth and disaster in southern Louisiana.” 2011. Web. 07 Mar 2021.

Vancouver:

Sanders HMC. Trials & tributaries: myth and disaster in southern Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2011. [cited 2021 Mar 07]. Available from: etd-05202011-154316 ; https://digitalcommons.lsu.edu/gradschool_theses/2404.

Council of Science Editors:

Sanders HMC. Trials & tributaries: myth and disaster in southern Louisiana. [Masters Thesis]. Louisiana State University; 2011. Available from: etd-05202011-154316 ; https://digitalcommons.lsu.edu/gradschool_theses/2404

Louisiana State University

25. Rotondo, Kristina Anne. Transport and deposition of fluid mud event layers along the western Louisiana inner shelf.

Degree: MS, Oceanography and Atmospheric Sciences and Meteorology, 2004, Louisiana State University

URL: etd-06222004-145908 ; https://digitalcommons.lsu.edu/gradschool_theses/1695

► The western Louisiana inner shelf along the Chenier Plain coast has experienced fluid mud deposition in response to increased fine sediment supplied by the… (more)

▼ The western Louisiana inner shelf along the Chenier Plain coast has experienced fluid mud deposition in response to increased fine sediment supplied by the Atchafalaya River since ~1950’s. The goal of this project is to assess the characteristics comprising the sedimentary strata and stratigraphic architecture that result from mud deposition on the inner shelf. Recent time-series cores collected from the inner shelf along the Chenier plain coast show the region is subject to transient fluid mud deposition, leading to high long-term accumulation rates. Sediment cores were collected in May 2001, March and May 2002 from the inner shelf landward of the 10 m isobath, 100 km west of Atchafalaya Bay. Porosity, granulometry, X-radiography, and 7Be, 210Pb and 137Cs geochronology indicate the presence of high-porosity event layers 2-25 cm thick composed of clay with basal silt laminations. These event layers appear to concentrate around a depocenter located 95-110 km west of the Atchafalaya River, landward of the 7 m isobath, but can be ephemeral features on a seasonal time scale. The combination of high-energy benthic hydrodynamics and sufficient fine sediment can result in cross-shelf gravity-driven flows (on very low slopes) that can blanket hundreds of square kilometers to thicknesses exceeding 10 cm. The sedimentary fabric that results from gravity-driven flows consists of a stacked pattern of predominantly fine-grained, fining upward packages. The resulting morphology of the shelf may be a clinoform, with maximum deposition occurring on the foreset (convex upward) region. The observations from the western Louisiana inner shelf (mud/silt couplets that comprise the fine-scale stratigraphy of the region, ephemeral 7Be deposits, and clinoform morphology exhibiting erosional features in sidescan and chirp data) are consistent with the wave-enhanced gravity-driven flow model. These results indicate that wave-enhanced gravity driven flows may be an important component in the dispersal of Atchafalaya River sediment.

Subjects/Keywords: gravity-driven flow; clinoform; Atchafalaya River; fluid mud; beryllium-7; Chenier Plain; event sedimentation

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APA (6^th Edition):

Rotondo, K. A. (2004). Transport and deposition of fluid mud event layers along the western Louisiana inner shelf. (Masters Thesis). Louisiana State University. Retrieved from etd-06222004-145908 ; https://digitalcommons.lsu.edu/gradschool_theses/1695

Chicago Manual of Style (16^th Edition):

Rotondo, Kristina Anne. “Transport and deposition of fluid mud event layers along the western Louisiana inner shelf.” 2004. Masters Thesis, Louisiana State University. Accessed March 07, 2021. etd-06222004-145908 ; https://digitalcommons.lsu.edu/gradschool_theses/1695.

MLA Handbook (7^th Edition):

Rotondo, Kristina Anne. “Transport and deposition of fluid mud event layers along the western Louisiana inner shelf.” 2004. Web. 07 Mar 2021.

Vancouver:

Rotondo KA. Transport and deposition of fluid mud event layers along the western Louisiana inner shelf. [Internet] [Masters thesis]. Louisiana State University; 2004. [cited 2021 Mar 07]. Available from: etd-06222004-145908 ; https://digitalcommons.lsu.edu/gradschool_theses/1695.

Council of Science Editors:

Rotondo KA. Transport and deposition of fluid mud event layers along the western Louisiana inner shelf. [Masters Thesis]. Louisiana State University; 2004. Available from: etd-06222004-145908 ; https://digitalcommons.lsu.edu/gradschool_theses/1695

Louisiana State University

26. Kobashi, Daijiro. Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms.

Degree: PhD, Oceanography and Atmospheric Sciences and Meteorology, 2008, Louisiana State University

URL: etd-01222009-042457 ; https://digitalcommons.lsu.edu/gradschool_dissertations/332

► Ship Shoal, a shore-parallel sand body, was recently recognized as having a unique physical and biological environment and also as a potential sand resource for… (more)

▼ Ship Shoal, a shore-parallel sand body, was recently recognized as having a unique physical and biological environment and also as a potential sand resource for coastal restoration in coastal Louisiana. Little is known regarding such dynamics, in concert with fluvial sediments and winter storms, influenced in unique ecosystems, and likely in future potential sand mining. This dissertation addresses such the morphodynamics and sedimentary processes and their implications for the mining from the shoal using field measurements and numerical modeling studies. During the winter-spring season, fluvial sediment plumes shifted from the prevailing west to southeast during the post-frontal phases, resulted in accumulation of fluid mud on the eastern flank of the shoal and consequent shoal sediment heterogeneity during the spring of 2006; this fluid mud layer strongly interacted with storm waves and currents through the processes of sediment re-suspension, vertical mixing, and hindered settling and redistribution. Studies during winter 2008 represented dynamics dominated by non-cohesive bottom material and hence followed the conventional approaches. State-of-the-art numerical models for waves, currents and transport provided reasonably well estimation for the study area and showed changes in wave transformation, current variability, and sediment transport for various hypothetical post-dredging scenarios. Sediment re-suspension intensity showed spatial differences along the shoal: high on the western flank of the shoal and a decrease toward the eastern shoal due to the change in shoal bathymetry. The results indicated a favor for the fluid mud accumulation on the eastern flank of the shoal, corroborated by in-situ measurements. Data suggest that Ship Shoal appears to have recurring sandy and muddy bottoms depending on the amount of storm-induced sediment reworking and fluvially-derived sediments. The fluid mud on the shoal seems to be patchy and does not remain in place as permanently consolidated mud, given the frequency of winter storms and the dispersal shifts. Numerical simulations suggest that targeted small-scale mining would not significantly alter the hydrodynamics and sediment transport over the shoal. Dredging from the eastern flank of the shoal may give rise to lesser impacts than that from the middle and western flank of the shoal. This suggestion is consistent with that from our collaborative biological study.

Subjects/Keywords: Bottom boundary layer dynamics; Sediment heterogeneity; Fluid mud; Barrier island restoration; Sand mining; Atchafalaya River

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APA (6^th Edition):

Kobashi, D. (2008). Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-01222009-042457 ; https://digitalcommons.lsu.edu/gradschool_dissertations/332

Chicago Manual of Style (16^th Edition):

Kobashi, Daijiro. “Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms.” 2008. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-01222009-042457 ; https://digitalcommons.lsu.edu/gradschool_dissertations/332.

MLA Handbook (7^th Edition):

Kobashi, Daijiro. “Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms.” 2008. Web. 07 Mar 2021.

Vancouver:

Kobashi D. Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms. [Internet] [Doctoral dissertation]. Louisiana State University; 2008. [cited 2021 Mar 07]. Available from: etd-01222009-042457 ; https://digitalcommons.lsu.edu/gradschool_dissertations/332.

Council of Science Editors:

Kobashi D. Bottom boundary layer physics and sediment transport along a transgressive sand body, Ship Shoal, south-central Louisiana: implications for fluvial sediments and winter storms. [Doctoral Dissertation]. Louisiana State University; 2008. Available from: etd-01222009-042457 ; https://digitalcommons.lsu.edu/gradschool_dissertations/332

27. Evans, Tessa Annette Neblett. From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana.

Degree: 2014, James Madison University

URL: https://commons.lib.jmu.edu/master201019/196

► This project is a landscape study that examines how different members of the antebellum and postbellum community in Arkansas and Louisiana perceived and used the… (more)

Subjects/Keywords: slavery; African-Americans; swamps; Arkansas; Louisiana; Antebellum; Postbellum; religion; resistance; economic; landscape; Scott Bond; Solomon Northup; perceptual; plats; Mississippi River; History

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APA (6^th Edition):

Evans, T. A. N. (2014). From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana. (Masters Thesis). James Madison University. Retrieved from https://commons.lib.jmu.edu/master201019/196

Chicago Manual of Style (16^th Edition):

Evans, Tessa Annette Neblett. “From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana.” 2014. Masters Thesis, James Madison University. Accessed March 07, 2021. https://commons.lib.jmu.edu/master201019/196.

MLA Handbook (7^th Edition):

Evans, Tessa Annette Neblett. “From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana.” 2014. Web. 07 Mar 2021.

Vancouver:

Evans TAN. From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana. [Internet] [Masters thesis]. James Madison University; 2014. [cited 2021 Mar 07]. Available from: https://commons.lib.jmu.edu/master201019/196.

Council of Science Editors:

Evans TAN. From swamps to swamping: The usage and perceptions of swamps by African-Americans in Antebellum and Postbellum Arkansas and Louisiana. [Masters Thesis]. James Madison University; 2014. Available from: https://commons.lib.jmu.edu/master201019/196

Louisiana State University

28. Baustian, Melissa Millman. Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics.

Degree: PhD, Oceanography and Atmospheric Sciences and Meteorology, 2011, Louisiana State University

URL: etd-06272011-200559 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3490

► The presence or absence of microphytobenthos on the seafloor provides clues about whether benthic oxygen evolution contributes significantly to the oxygen budget of the hypoxic… (more)

▼ The presence or absence of microphytobenthos on the seafloor provides clues about whether benthic oxygen evolution contributes significantly to the oxygen budget of the hypoxic area in the northern Gulf of Mexico. Hypoxia (oxygen < 2 mg l-1) creates inadequate concentrations of dissolved oxygen to support most organisms, such as fish, shrimp and crabs, and occurs over large areas of the Louisiana continental shelf from spring through summer in most years. Oxygen production by benthic autotrophs may offset a decline in oxygen concentrations if there is a functioning community and sufficient light. I sampled three stations (14, 20 and 23 m depths) ~ 100 km west of the Mississippi River over three hypoxic annual cycles (2006 – 2008), and 11 stations along a 14 - 20 m contour on the shelf in late-July in 2006, 2007 and 2008. I used microscopy and high-performance liquid chromatography to estimate the biomass and composition of phytoplankton and microphytobenthos. The potential seasonal oxygen production was estimated in 2007 and 2008 by incubating coupled light/dark sediment cores and bottom water from two stations. The sediment community (cells > 3 um) differed from those in the water column and were frequently benthic pennate diatoms and filamentous cyanobacteria (58-88% seasonally and 1-99% in mid-summer). The concentration of microphytobenthic biomass was usually < 2.0 ug g dry sed-1, and various biotic parameters were influenced by light at the seafloor. Declines in dissolved oxygen over a seasonal cycle in 2007 and 2008 were affected more by the initial dissolved oxygen concentration than by the presence of microphytobenthos that could generate oxygen. The sediment (1.2 - 27.3 mmol O2 m-2 d-1, n = 97) and bottom-water (1.1 - 17.5 mmol m-2 d-1, n = 23) oxygen consumption rates were within the range of the few previously-reported data. This work adds to these data and also provides the only sediment oxygen consumption rates at fixed sites over seasonal time scales. These results provide critical input to three-dimensional, physical-biological models of oxygen dynamics for this hypoxic area.

Subjects/Keywords: cyanobacteria; benthic microalgae; phytoplankton; photosynthetic available radiation; hypoxia; oxygen consumption; Louisiana continental shelf; Mississippi River; nutrient fluxes

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APA (6^th Edition):

Baustian, M. M. (2011). Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-06272011-200559 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3490

Chicago Manual of Style (16^th Edition):

Baustian, Melissa Millman. “Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics.” 2011. Doctoral Dissertation, Louisiana State University. Accessed March 07, 2021. etd-06272011-200559 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3490.

MLA Handbook (7^th Edition):

Baustian, Melissa Millman. “Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics.” 2011. Web. 07 Mar 2021.

Vancouver:

Baustian MM. Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics. [Internet] [Doctoral dissertation]. Louisiana State University; 2011. [cited 2021 Mar 07]. Available from: etd-06272011-200559 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3490.

Council of Science Editors:

Baustian MM. Microphytobenthos of the northern Gulf of Mexico hypoxic area and their role in oxygen dynamics. [Doctoral Dissertation]. Louisiana State University; 2011. Available from: etd-06272011-200559 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3490

Texas A&M University

29. Beauchamp, Michael Kelly. Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820.

Degree: PhD, History, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7403

► The United States confronted new problems of territorial expansion with the Louisiana Purchase, as it involved, for the first time, the transfer in sovereignty of… (more)

Subjects/Keywords: Louisiana Elites; Early National Louisiana; Louisiana History

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Beauchamp, M. K. (2011). Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7403

Chicago Manual of Style (16^th Edition):

Beauchamp, Michael Kelly. “Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820.” 2011. Doctoral Dissertation, Texas A&M University. Accessed March 07, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7403.

MLA Handbook (7^th Edition):

Beauchamp, Michael Kelly. “Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820.” 2011. Web. 07 Mar 2021.

Vancouver:

Beauchamp MK. Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820. [Internet] [Doctoral dissertation]. Texas A&M University; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7403.

Council of Science Editors:

Beauchamp MK. Instruments of Empire: Colonial Elites and U.S. Governance in Early National Louisiana, 1803-1820. [Doctoral Dissertation]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7403

University of Florida

30. Safak, Ilgar. Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA.

Degree: PhD, Coastal and Oceanographic Engineering - Civil and Coastal Engineering, 2010, University of Florida

URL: https://ufdc.ufl.edu/UFE0042017

► Interaction of near-bed wave-induced turbulence and cohesive sediments in muddy environments is studied based on field observations and a bottom boundary layer model. Wave, current,… (more)

▼ Interaction of near-bed wave-induced turbulence and cohesive sediments in muddy environments is studied based on field observations and a bottom boundary layer model. Wave, current, and sediment observations were collected with a suite of acoustic and optical instrumentation at approximately 5-m depth on the muddy Atchafalaya clinoform, Louisiana, USA. Low wave-bias estimates of near-bed Reynolds stresses are obtained by a method that is based on differencing and filtering of velocities from two sensors. The event that is focused on in this study is characterized by moderate waves with high steepness, currents with speeds sometimes reaching 30 cm/s near bed, and Reynolds stresses and suspended sediment concentrations reaching to their maximum values throughout the experiment (0.4 Pa, 3 g/L). In general, Reynolds stresses are found to be correlated with short-wave near-bed accelerations and suspended sediment concentration, as previously observed on sandy beaches, where accelerations have been associated with bed fluidization and sediment transport. A detailed numerical analysis of the observations is performed with a one-dimensional bottom boundary layer model for small scale turbulence and sediment transport processes on cohesive beds. The model accounts for the coupling between the fluid and the cohesive sediment phases, and uses a floc size that is constant in time and space. A representative floc size is selected for the experiment site, based on two independent sources that show consistency. Direct estimates of size distribution of suspended sediments in the vicinity of the experiment site show a remarkably stable floc mode peak under varying wave and turbulence conditions. Indirect estimates of equilibrium floc size are obtained through calculations of an analytical flocculation model that uses observation-based parameters. With a floc size input based on the observations, the model reproduces currents and suspended sediment concentrations accurately; modeled Reynolds stresses match the low wave-bias estimates, with better agreement for cases of stronger currents and smaller wave-orbital velocities. The numerical simulations suggest that sediment-induced stratification effects are the same order of magnitude as turbulent dissipation, and thus play a significant role in the turbulent kinetic energy (TKE) balance within the tidal boundary layer. However, inside the wave boundary layer, the ratio of stratification to shear-induced turbulence production (i.e., gradient Richardson number) decreases significantly; shear-induced turbulence production and turbulent dissipation dominate the TKE balance. For these observations, model results show that the vertical structures of currents and Reynolds stresses are relatively insensitive to the exact floc size. Future efforts should include analysis of wider range of conditions (especially events with higher near-bed concentrations), and comparison of model results with a more detailed vertical structure of suspended sediment concentration. ( en ) Advisors/Committee Members: Sheremet, Alexandru (committee chair), Slinn, Donald N. (committee member), Valle-Levinson, Arnoldo (committee member), Adams, Peter Nelson (committee member), McKee Smith, Jane (committee member).

Subjects/Keywords: Boundary layers; Modeling; Mud; Reynolds stress; Sediments; Sensors; Turbulence; Turbulence models; Velocity; Waves; atchafalaya, boundary, coastal, cohesive, concentration, current, dissipation, floc, louisiana, model, mud, nearshore, ocean, reynolds, sediment, shelf, stratification, stress, tke, turbulence, wave, wind

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Safak, I. (2010). Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0042017

Chicago Manual of Style (16^th Edition):

Safak, Ilgar. “Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA.” 2010. Doctoral Dissertation, University of Florida. Accessed March 07, 2021. https://ufdc.ufl.edu/UFE0042017.

MLA Handbook (7^th Edition):

Safak, Ilgar. “Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA.” 2010. Web. 07 Mar 2021.

Vancouver:

Safak I. Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA. [Internet] [Doctoral dissertation]. University of Florida; 2010. [cited 2021 Mar 07]. Available from: https://ufdc.ufl.edu/UFE0042017.

Council of Science Editors:

Safak I. Interaction of bottom turbulence and cohesive sediment on the muddy Atchafalaya Shelf, Louisiana, USA. [Doctoral Dissertation]. University of Florida; 2010. Available from: https://ufdc.ufl.edu/UFE0042017

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