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Détail de l'auteur
Auteur Singh, Vijay P.
Documents disponibles écrits par cet auteur
Affiner la rechercheAnalysis of Soil Water Retention Data Using Artificial Neural Networks / Singh, Vijay P. in Journal of hydrologic engineering, Vol. 9, N° 5 (Septembre /Octobre 2004)
[article]
in Journal of hydrologic engineering > Vol. 9, N° 5 (Septembre /Octobre 2004) . - 415-420 p.
Titre : Analysis of Soil Water Retention Data Using Artificial Neural Networks Titre original : Analyse des Données de Conservation de l'Eau de Sol en Utilisant les Réseaux Neurologiques Artificiels Type de document : texte imprimé Auteurs : Singh, Vijay P., Auteur ; Jain, S. K., Auteur ; Van Genuchten, M. Th. Article en page(s) : 415-420 p. Note générale : Hydrologie Langues : Anglais (eng) Mots-clés : Neural networks Soil water Soil water storage Hysteresis Soil suction Réseaux neurologiques Eau de sol stockage de l'eau Hystérésis Aspiration de sol Index. décimale : 551.4 Résumé : Many studies of water flow and solute transport in the vadose zone require estimates of the unsaturated soil hydraulic properties, including the soil water retention curve (WRC) describing the relationship between soil suction and water content. An artificial neural network (ANN) approach was developed to describe the WRC using observed data from several soils. The ANN approach was found to produce equally or more accurate descriptions of the retention data as compared to several analytical retention functions popularly used inthe vadoze zone hydrology literature. Given sufficient input data, the ANN approach was also found to closely describe the hysteretic behavior of a soil, including observed scanning wetting and drying curves.
Beaucoup d'études d'écoulement de l'eau et de transport de corps dissous dans la zone de vadose exigent des évaluations des propriétés hydrauliques de sol insaturé, y compris la courbe de conservation de l'eau de sol (WRC) décrivant le rapport entre l'aspiration de sol et la teneur en eau. Une approche artificielle de réseau neurologique (ANN) a été développée pour décrire le WRC en utilisant des données observées de plusieurs sols. L'approche d'ANN s'est avérée pour produire également ou des descriptions plus précises des données de conservation par rapport à plusieurs fonctions analytiques de conservation ont populairement employé la littérature d'hydrologie de zone de vadoze d'inthe. Des données d'entrée suffisantes données, l'approche d'ANN se sont également avérées pour décrire étroitement le comportement par hystérésis d'un sol, y compris le mouillage de balayage observé et les courbes de séchage.En ligne : cesing@1su.edu [article] Analysis of Soil Water Retention Data Using Artificial Neural Networks = Analyse des Données de Conservation de l'Eau de Sol en Utilisant les Réseaux Neurologiques Artificiels [texte imprimé] / Singh, Vijay P., Auteur ; Jain, S. K., Auteur ; Van Genuchten, M. Th. . - 415-420 p.
Hydrologie
Langues : Anglais (eng)
in Journal of hydrologic engineering > Vol. 9, N° 5 (Septembre /Octobre 2004) . - 415-420 p.
Mots-clés : Neural networks Soil water Soil water storage Hysteresis Soil suction Réseaux neurologiques Eau de sol stockage de l'eau Hystérésis Aspiration de sol Index. décimale : 551.4 Résumé : Many studies of water flow and solute transport in the vadose zone require estimates of the unsaturated soil hydraulic properties, including the soil water retention curve (WRC) describing the relationship between soil suction and water content. An artificial neural network (ANN) approach was developed to describe the WRC using observed data from several soils. The ANN approach was found to produce equally or more accurate descriptions of the retention data as compared to several analytical retention functions popularly used inthe vadoze zone hydrology literature. Given sufficient input data, the ANN approach was also found to closely describe the hysteretic behavior of a soil, including observed scanning wetting and drying curves.
Beaucoup d'études d'écoulement de l'eau et de transport de corps dissous dans la zone de vadose exigent des évaluations des propriétés hydrauliques de sol insaturé, y compris la courbe de conservation de l'eau de sol (WRC) décrivant le rapport entre l'aspiration de sol et la teneur en eau. Une approche artificielle de réseau neurologique (ANN) a été développée pour décrire le WRC en utilisant des données observées de plusieurs sols. L'approche d'ANN s'est avérée pour produire également ou des descriptions plus précises des données de conservation par rapport à plusieurs fonctions analytiques de conservation ont populairement employé la littérature d'hydrologie de zone de vadoze d'inthe. Des données d'entrée suffisantes données, l'approche d'ANN se sont également avérées pour décrire étroitement le comportement par hystérésis d'un sol, y compris le mouillage de balayage observé et les courbes de séchage.En ligne : cesing@1su.edu Analysis of the vertical profile of concentration in sediment-laden flows / Qing-Quan Liu in Journal of engineering mechanics, Vol. 133 N°6 (Juin 2007)
[article]
in Journal of engineering mechanics > Vol. 133 N°6 (Juin 2007) . - pp.601–607.
Titre : Analysis of the vertical profile of concentration in sediment-laden flows Type de document : texte imprimé Auteurs : Qing-Quan Liu, Auteur ; An-Ping Shu, Auteur ; Singh, Vijay P., Auteur Année de publication : 2007 Article en page(s) : pp.601–607. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Sediment concentration Turbulent diffusion Sediment transport Résumé : From a theoretical investigation of the sediment concentration distribution in sediment-laden flows, a relationship between the profile of sediment concentration and the intensity of vertical fluctuation of particles was established and indirectly verified using experimental data obtained in a vertical rectangular duct flow. It is shown that sediment suspension and the profile of sediment concentration are significantly influenced by the particle fluctuation. This leads to a new explanation for the mechanism of two patterns of sediment concentration profiles. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A6%2860 [...] [article] Analysis of the vertical profile of concentration in sediment-laden flows [texte imprimé] / Qing-Quan Liu, Auteur ; An-Ping Shu, Auteur ; Singh, Vijay P., Auteur . - 2007 . - pp.601–607.
Applied mechanics
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 133 N°6 (Juin 2007) . - pp.601–607.
Mots-clés : Sediment concentration Turbulent diffusion Sediment transport Résumé : From a theoretical investigation of the sediment concentration distribution in sediment-laden flows, a relationship between the profile of sediment concentration and the intensity of vertical fluctuation of particles was established and indirectly verified using experimental data obtained in a vertical rectangular duct flow. It is shown that sediment suspension and the profile of sediment concentration are significantly influenced by the particle fluctuation. This leads to a new explanation for the mechanism of two patterns of sediment concentration profiles. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A6%2860 [...] Analytical solution for conservative solute transport in one-dimensional homogeneous porous formations with time-dependent velocity / Kumar Singh, Mritunjay in Journal of engineering mechanics, Vol. 135 N° 9 (Septembre 2009)
[article]
in Journal of engineering mechanics > Vol. 135 N° 9 (Septembre 2009) . - pp. 1015-1021
Titre : Analytical solution for conservative solute transport in one-dimensional homogeneous porous formations with time-dependent velocity Type de document : texte imprimé Auteurs : Kumar Singh, Mritunjay, Auteur ; Singh, Vijay P., Auteur ; Singh, Premlata, Auteur Article en page(s) : pp. 1015-1021 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Groundwater pollution Nonpoint pollution Point pollution Aquifers Unsteady flow Solutes Analytical techniques. Résumé : The space-time variation in contaminant concentration in unsteady flow in a homogeneous finite aquifer subjected to point source contamination is analytically derived under two conditions: (1) the flow velocity in the aquifer is of sinusoidal form; and (2) the flow velocity is an exponentially decreasing function. The analytical solution is illustrated using an example. Analytical solutions are perhaps most useful for benchmarking numerical codes and solutions. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] [article] Analytical solution for conservative solute transport in one-dimensional homogeneous porous formations with time-dependent velocity [texte imprimé] / Kumar Singh, Mritunjay, Auteur ; Singh, Vijay P., Auteur ; Singh, Premlata, Auteur . - pp. 1015-1021.
Mécanique appliquée
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 135 N° 9 (Septembre 2009) . - pp. 1015-1021
Mots-clés : Groundwater pollution Nonpoint pollution Point pollution Aquifers Unsteady flow Solutes Analytical techniques. Résumé : The space-time variation in contaminant concentration in unsteady flow in a homogeneous finite aquifer subjected to point source contamination is analytically derived under two conditions: (1) the flow velocity in the aquifer is of sinusoidal form; and (2) the flow velocity is an exponentially decreasing function. The analytical solution is illustrated using an example. Analytical solutions are perhaps most useful for benchmarking numerical codes and solutions. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] Analytical solution for one - dimensional solute dispersion with time - dependent source concentration along uniform groundwater flow in a homogeneous porous formation / Kumar Singh, Mritunjay in Journal of engineering mechanics, Vol. 138 N° 8 (Août 2012)
[article]
in Journal of engineering mechanics > Vol. 138 N° 8 (Août 2012) . - pp.1045–1056.
Titre : Analytical solution for one - dimensional solute dispersion with time - dependent source concentration along uniform groundwater flow in a homogeneous porous formation Type de document : texte imprimé Auteurs : Kumar Singh, Mritunjay, Auteur ; Shafique Ahamad, Auteur ; Singh, Vijay P., Auteur Année de publication : 2012 Article en page(s) : pp.1045–1056. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Solute transport Groundwater contamination Aquifer Analytical solution Résumé : An analytical solution for the space-time variation of contaminant concentration in one-dimensional uniform groundwater flow in a homogenous semi-infinite porous formation (e.g., aquifer) subjected to time-dependent source contamination is derived. The temporally dependent dispersion in the aquifer is investigated under two conditions. First, the temporally dependent dispersion distribution in the aquifer is considered as a sinusoidally varying function and, second, the temporally dependent dispersion distribution is treated as an exponentially increasing function of time. It is assumed that initially the aquifer is not solute free; i.e., the aquifer is not clean and the initial concentration is an exponentially decreasing function of the space variable and is tending to zero toward infinity. The concept that dispersion is directly proportional to the seepage velocity is employed. The analytical solution is illustrated using an example and may help benchmark a numerical code and solution. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000384 [article] Analytical solution for one - dimensional solute dispersion with time - dependent source concentration along uniform groundwater flow in a homogeneous porous formation [texte imprimé] / Kumar Singh, Mritunjay, Auteur ; Shafique Ahamad, Auteur ; Singh, Vijay P., Auteur . - 2012 . - pp.1045–1056.
Mécanique appliquée
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 138 N° 8 (Août 2012) . - pp.1045–1056.
Mots-clés : Solute transport Groundwater contamination Aquifer Analytical solution Résumé : An analytical solution for the space-time variation of contaminant concentration in one-dimensional uniform groundwater flow in a homogenous semi-infinite porous formation (e.g., aquifer) subjected to time-dependent source contamination is derived. The temporally dependent dispersion in the aquifer is investigated under two conditions. First, the temporally dependent dispersion distribution in the aquifer is considered as a sinusoidally varying function and, second, the temporally dependent dispersion distribution is treated as an exponentially increasing function of time. It is assumed that initially the aquifer is not solute free; i.e., the aquifer is not clean and the initial concentration is an exponentially decreasing function of the space variable and is tending to zero toward infinity. The concept that dispersion is directly proportional to the seepage velocity is employed. The analytical solution is illustrated using an example and may help benchmark a numerical code and solution. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000384 Analytical solution for two-dimensional solute transport in finite aquifer with time-dependent source concentration / Mritunjay Kumar Singh in Journal of engineering mechanics, Vol. 136 N° 10 (Octobre 2010)
[article]
in Journal of engineering mechanics > Vol. 136 N° 10 (Octobre 2010) . - pp.1309-1315
Titre : Analytical solution for two-dimensional solute transport in finite aquifer with time-dependent source concentration Type de document : texte imprimé Auteurs : Mritunjay Kumar Singh, Auteur ; Premlata Singh, Auteur ; Singh, Vijay P., Auteur Année de publication : 2010 Article en page(s) : pp.1309-1315 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Solutes Groundwater pollution Aquifers Analytical techniques. Résumé : Using the Hankel Transform Technique, an analytical solution is derived for two-dimensional solute transport in a homogeneous isotropic aquifer. The aquifer is subjected to time-dependent point source contamination. The solution is derived under two conditions: (1) the flow velocity in the aquifer is a sinusoidally varying function and (2) the flow velocity is an exponentially decreasing function. Initially the aquifer is assumed solute free. The analytical solution is illustrated using an example. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i10/p1309_s1?isAuthorized=no [article] Analytical solution for two-dimensional solute transport in finite aquifer with time-dependent source concentration [texte imprimé] / Mritunjay Kumar Singh, Auteur ; Premlata Singh, Auteur ; Singh, Vijay P., Auteur . - 2010 . - pp.1309-1315.
Mécanique appliquée
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 136 N° 10 (Octobre 2010) . - pp.1309-1315
Mots-clés : Solutes Groundwater pollution Aquifers Analytical techniques. Résumé : Using the Hankel Transform Technique, an analytical solution is derived for two-dimensional solute transport in a homogeneous isotropic aquifer. The aquifer is subjected to time-dependent point source contamination. The solution is derived under two conditions: (1) the flow velocity in the aquifer is a sinusoidally varying function and (2) the flow velocity is an exponentially decreasing function. Initially the aquifer is assumed solute free. The analytical solution is illustrated using an example. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i10/p1309_s1?isAuthorized=no Another Look at SCS-CN Method / Mishra, Surendra Kumar in Journal of hydrologic engineering, Vol. 4, N° 3 (Juillet 1999)
PermalinkBivariate Flood Frequency Analysis Using the Copula Method / Singh, Vijay P. in Journal of hydrologic engineering, Vol. 11, N°2 (Mars/Avril 2006)
PermalinkDiffusion-Based Semi-Infinite Fourier Probability Distribution / Adrian, Donald Dean in Journal of hydrologic engineering, Vol. 7, N° 2 (Mars/Avril 2002)
PermalinkEffect of Micro topography, Slope Length and Gradient, and Vegetative Cover on Overland Flow through Simulation / Liu, Q. Q. in Journal of hydrologic engineering, Vol. 9, N° 5 (Septembre /Octobre 2004)
PermalinkEnhanced Runoff Curve Number Model Incorporating Storm Duration and a Nonlinear I a-S Relation / Jain, M. K. in Journal of hydrologic engineering, Vol. 11 N°6 (Novembre/Decembre 2006)
PermalinkEntropy-Based Parameter Estimation for Kappa Distribution / Singh, Vijay P. in Journal of hydrologic engineering, Vol. 8, N° 2 (Mars/Avril 2003)
PermalinkEstimation of Mean Velocity in Natural Channels Based on Chiu's Velocity Distribution Equation / Singh, Vijay P. in Journal of hydrologic engineering, Vol. 9, N° 1 (Janvier/Fevrier 2004)
PermalinkFinite Fourier Probability Distribution and Applications / Tsai, Ching-Nien in Journal of hydrologic engineering, Vol. 6, N° 6 (Novembre/Decembre 2001)
PermalinkFluid-Solid Interaction in Particle-Laden Flows / Liu, Q. Q. in Journal of engineering mechanics, Vol. 130 N°12 (Decembre 2004)
PermalinkFrequency Analysis of Flood Damage / Singh, Vijay P. in Journal of hydrologic engineering, Vol. 10, N°2 (Mars/Avril 2005)
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