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You searched for subject:(Specific storativity). Showing records 1 – 2 of 2 total matches.

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Texas A&M University

1. Cavdar, Sevgi. Assessing the Transient Flow Behavior in Falling-head Permeameter Tests.

Degree: MS, Geology, 2013, Texas A&M University

The proportionality constant in Darcy's Law is called hydraulic conductivity (K), and it is the most fundamental parameter to groundwater studies. There are a number of in situ and laboratory techniques employed to determine K, one of which is falling head permeameter (FHP). In FHP, determining K involves two steps: measuring hydraulic head change over time and calculating the K value. In the past, calculating K was done using Darcy's Law, which states linear correlation between the flux and the hydraulic gradient, but this is only true when the inertial forces are negligible at small velocities. At higher velocities, flow becomes unsteady because of the change over time in flow magnitude and hydraulic gradient, which requires mass conservation law to be combined with Darcy’s Law and eventually leads to Laplace’s equation for an incompressible matrix. If the media is compressible, specific storativity should be taken into account, as well. In this study, we investigated the transiency of flow in FHP tests by analyzing the effect of specific storativity on K calculations. We have developed a new semi- analytical solution for transient flow in FHP in Laplace domain and used the de Hoog algorithm to attain the inverse Laplace transform of this solution to yield solutions in time domain. We have also provided some analysis and a comparison of steady-state solution along with using experimental data and the data from the literature to analyze the solution. Upon these, we concluded that the transient flow in falling-head tests has minimal effect in general, although using the transient solution provided may improve the accuracy without a major effect. Advisors/Committee Members: Zhan, Hongbin (advisor), Sparks, David (committee member), Sanchez, Marcelo (committee member), Duan, Benchun (committee member).

Subjects/Keywords: storativity; specific storativity; falling-head permeameter; transient

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APA (6th Edition):

Cavdar, S. (2013). Assessing the Transient Flow Behavior in Falling-head Permeameter Tests. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149519

Chicago Manual of Style (16th Edition):

Cavdar, Sevgi. “Assessing the Transient Flow Behavior in Falling-head Permeameter Tests.” 2013. Masters Thesis, Texas A&M University. Accessed September 23, 2020. http://hdl.handle.net/1969.1/149519.

MLA Handbook (7th Edition):

Cavdar, Sevgi. “Assessing the Transient Flow Behavior in Falling-head Permeameter Tests.” 2013. Web. 23 Sep 2020.

Vancouver:

Cavdar S. Assessing the Transient Flow Behavior in Falling-head Permeameter Tests. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2020 Sep 23]. Available from: http://hdl.handle.net/1969.1/149519.

Council of Science Editors:

Cavdar S. Assessing the Transient Flow Behavior in Falling-head Permeameter Tests. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149519


INP Toulouse

2. Fatmi, Hassane. Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne.

Degree: Docteur es, Hydrogéologie et sûreté nucléaire, 2009, INP Toulouse

Ce rapport présente des méthodes de prétraitement, d'analyse statistique et d'interprétation de chroniques hydrogéologiques de massifs peu perméables (argilites) dans le cadre d'études sur le stockage profond de déchets radioactifs. Les séries temporelles analysées sont la pression interstitielle et la pression atmosphérique, en relation avec différents phénomènes (marées terrestres, effet barométrique, évolution de l'excavation des galeries). Les pré-traitements permettent de reconstituer et homogénéiser les chroniques de données en présence de lacunes, aberrations, et pas de temps variables. Les signaux prétraités sont ensuite analysés en vue de caractériser les propriétés hydrauliques du massif peu perméable (emmagasinement spécifique ; porosité effective). Pour cela, on a développé et mis en oeuvre les méthodes d'analyses suivantes (implémentées en Matlab): analyses corrélatoires et spectrales (Fourier) ; analyses ondelettes multirésolution ; enveloppes de signaux aléatoires. Cette méthodologie est appliquée aux données acquises au Laboratoire Souterrain du Consortium International du Mont Terri (Jura Suisse), ainsi qu'à certaines données des Laboratoires Souterrains de Tournemire (Aveyron) et de Meuse / Haute-Marne (ANDRA)

This report presents a set of statistical methods for pre-processing and analyzing multivariate hydrogeologic time series, such as pore pressure and its relation to atmospheric pressure. The goal is to study the hydrogeologic characteristics of low permeability geologic formations (argilite) in the context of deep disposal of radioactive waste. The pressure time series are analyzed in relation with different phenomena, such as earth tides, barometric effects, and the evolution of excavated galleries. The pre-processing is necessary for reconstituting and homogenizing the time series in the presence of data gaps, outliers, and variable time steps. The preprocessed signals are then analyzed with a view to characterizing the hydraulic properties of this type of low permeability formation (specific storativity; effective porosity). For this sake, we have developed and used the following methods (implemented in Matlab): temporal correlation analyses; spectral/Fourier analyses; multiresolution wavelet analyses envelopes of random processes. This methodology is applied to data collected at the URL (Underground Research Laboratory) of the Mont Terri International Consortium (Swiss Jura), as well as some other data collected at the URL of IRSN at Tournemire (Aveyron) and at the URL of ANDRA (Meuse / Haute-Marne)

Advisors/Committee Members: Ababou, Rachid (thesis director).

Subjects/Keywords: Mont Terri; Tournemire; Bure; Argilite; Argiles à Opalines; Callovo-Oxfordien; Pression interstitielle; Chroniques; Séries temporelles; Traitement des signaux; Processus aléatoires; Prétraitements; Reconstitution; Analyse corrélatoire; Analyse spectrale; Ondelettes multirésolution; Marées terrestres; Effet barométrique; Compressibilité; Porosité; Emmagasinement spécifique; Porosité effective; EDZ (Excavation Damaged Zone); Perméabilité; Pore pressure; Argilite; Signal pre-processing; Random processes; Earth tides; Barometric effect; Specific storativity; Effective porosity; Correlation analyses; Spectral Fourier analyses; Multiresolution wavelet analyses; EDZ (Excavation Damaged Zone); Hydrogeology

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

APA (6th Edition):

Fatmi, H. (2009). Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2009INPT020H

Chicago Manual of Style (16th Edition):

Fatmi, Hassane. “Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne.” 2009. Doctoral Dissertation, INP Toulouse. Accessed September 23, 2020. http://www.theses.fr/2009INPT020H.

MLA Handbook (7th Edition):

Fatmi, Hassane. “Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne.” 2009. Web. 23 Sep 2020.

Vancouver:

Fatmi H. Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne. [Internet] [Doctoral dissertation]. INP Toulouse; 2009. [cited 2020 Sep 23]. Available from: http://www.theses.fr/2009INPT020H.

Council of Science Editors:

Fatmi H. Méthodologie d’analyse des signaux et caractérisation hydrogéologique : application aux chroniques de données obtenues aux laboratoires souterrains du Mont Terri, Tournemire et Meuse/Haute-Marne : Signal analyzis methodology and hydrogeologic characterization : application to time series collected at the underground research laboratories of Mont Terri, Tournemire, and Meuse/Haute-Marne. [Doctoral Dissertation]. INP Toulouse; 2009. Available from: http://www.theses.fr/2009INPT020H

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