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Author
Title Streamflow extremes and climate variability in Southeastern United States
URL
Publication Date
Degree MS
Degree Level masters
University/Publisher Florida Atlantic University
Abstract

Summary: Trends in streamflow extremes at a regional scale linked to the possible influences of four major oceanic-atmospheric oscillations are analyzed in this study. Oscillations considered include: El Niño Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), Atlantic Multidecadal Oscillation (AMO), and North Atlantic Oscillation (NAO). The main emphasis is low flows in the South-Atlantic Gulf region of the United States. Several standard drought indices of low flow extremes during two different phases (warm/positive and cool/negative) of these oscillations are evaluated. Long-term streamflow data at 43 USGS sites in the region from the Hydro-Climatic Data Network that are least affected by anthropogenic influences are used for analysis. Results show that for ENSO, low flow indices were more likely to occur during La Niña phase; however, longer deficits were more likely during El Niño phase. Results also show that for PDO (AMO), all (most) low flow indices occur during the cool (warm) phase.

2015

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2015.

Collection: FAU

Subjects/Keywords Atmospheric physics  – Statistical methods; Climate change mitigation; Climatic changes  – Measurement; Hydrology; Mathematical statistics; Maxima and minima; Stream measurement
Contributors Teegavarapu, Ramesh (Thesis advisor); Florida Atlantic University (Degree grantor); College of Engineering and Computer Science; Department of Civil, Environmental and Geomatics Engineering
Language en
Rights Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Country of Publication us
Format 117 p
Record ID oai:fau.digital.flvc.org:fau_31265
Other Identifiers fau:31265; (IID) FA00004348
Repository fau
Date Retrieved
Date Indexed 2020-01-06

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…Multidecadal Oscillation ............................................................... 57 5.2.4 North Atlantic Oscillation ........................................................................... 60 5.3 7Q10 Statistical Significance Analysis…

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…all aspects of hydrology and water resources through the water budget. An issue of critical concern to the water-resource planning and management communities is low flows and droughts. The characteristics of low flows in 3 rivers and streams are…

statistical tests to the 7Q10 low flow index to determine if statistically significant differences in low flow extremes exist between two phases of oscillations. 6) Use the occurrences of low flows to determine the temporal differences between two phases…

…x28;ENSO, PDO, AMO, NAO). Discusses methods of analysis and results from similar studies. Chapter 3: Outlines the methodology used to evaluate streamflow extremes and characteristics. Includes low-flow frequency analysis, streamflow deficit, and…

…the NAO index values established by Tootle et al. (2005), the positive and negative phases of the NAO are outlined in the case study chapter. 2.2 Methods of Analysis There have been many studies investigating the influences of oceanic…

…PDO, AMO, NAO) on streamflow across the continental U.S. Their study was a comprehensive investigation of large regions to investigate whether ocean atmosphere phenomena influence hydrology at a large scale both individually (PDO, AMO, NAO…

…activity. 16 3 METHODS OF ANALYSIS The methods used to evaluate streamflow extremes and characteristics are explained in this chapter. A visual illustration of the procedures used in the methodology is shown in Figure 5. Figure 5: Methodology for…

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