Analytical construction of transient flow nets in homogeneous and isotropic flow medium / Senda Ozkan in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N° 6 (Juin 2008)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 134 N° 6 (Juin 2008) . - pp. 888–893 Titre : Analytical construction of transient flow nets in homogeneous and isotropic flow medium Type de document : texte imprimé Auteurs : Senda Ozkan, Auteur ; Donald D. Adrian, Auteur Année de publication : 2010 Article en page(s) : pp. 888–893 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Water flow Transient Seepage Time dependence Hydraulic structures Résumé : The purpose of this study is to construct time-dependent flow nets, also called transient flow nets in homogenous and isotropic flow medium. Transient flow nets under hydraulic structures are developed in response to reservoir head fluctuations. An analytical solution for a transient flow net has not been reported in the literature. Time-dependent flow net equations are limited in engineering applications to simple boundary conditions. The geometry of transient flow nets does not change with time, as only the numerical values assigned to equipotential lines and flow lines change with time. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A6%2888 [...] [article] Analytical construction of transient flow nets in homogeneous and isotropic flow medium [texte imprimé] / Senda Ozkan, Auteur ; Donald D. Adrian, Auteur . - 2010 . - pp. 888–893. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N° 6 (Juin 2008) . - pp. 888–893 Mots-clés : Water flow Transient Seepage Time dependence Hydraulic structures Résumé : The purpose of this study is to construct time-dependent flow nets, also called transient flow nets in homogenous and isotropic flow medium. Transient flow nets under hydraulic structures are developed in response to reservoir head fluctuations. An analytical solution for a transient flow net has not been reported in the literature. Time-dependent flow net equations are limited in engineering applications to simple boundary conditions. The geometry of transient flow nets does not change with time, as only the numerical values assigned to equipotential lines and flow lines change with time. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A6%2888 [...]

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Transient head development due to flood induced seepage under levees / Senda Ozkan in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N° 6 (Juin 2008)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 134 N° 6 (Juin 2008) . - pp. 781–789 Titre : Transient head development due to flood induced seepage under levees Type de document : texte imprimé Auteurs : Senda Ozkan, Auteur ; Donald D. Adrian, Auteur ; George L. Sills, Auteur Année de publication : 2010 Article en page(s) : pp. 781–789 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Floods Seepage Levees Sand Transient flow Water levels Résumé : The purpose of this study was to predict the uplift force during floods on confining layers that overlay extensive horizontal confined aquifers that intersect a large river in response to the water level changes that occur with time in a flooding river. Transient flow of water through the confined aquifer was described by a diffusion type of equation with a boundary condition at the river in which the river head varied with time. The transient head distribution developed from the unsteady flow model applied to the aquifer was compared with the hydraulic head distributions obtained from U.S. Army Corps of Engineers steady-state flow model and a finite-element seepage model. This study concluded that the transient flow model has the potential to analyze time lag in head development, and to predict the seepage condition and heaving potential at various times and distances landside of a levee during a flood cycle, but additional case histories are needed to justify widespread use of the model. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A6%2878 [...] [article] Transient head development due to flood induced seepage under levees [texte imprimé] / Senda Ozkan, Auteur ; Donald D. Adrian, Auteur ; George L. Sills, Auteur . - 2010 . - pp. 781–789. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N° 6 (Juin 2008) . - pp. 781–789 Mots-clés : Floods Seepage Levees Sand Transient flow Water levels Résumé : The purpose of this study was to predict the uplift force during floods on confining layers that overlay extensive horizontal confined aquifers that intersect a large river in response to the water level changes that occur with time in a flooding river. Transient flow of water through the confined aquifer was described by a diffusion type of equation with a boundary condition at the river in which the river head varied with time. The transient head distribution developed from the unsteady flow model applied to the aquifer was compared with the hydraulic head distributions obtained from U.S. Army Corps of Engineers steady-state flow model and a finite-element seepage model. This study concluded that the transient flow model has the potential to analyze time lag in head development, and to predict the seepage condition and heaving potential at various times and distances landside of a levee during a flood cycle, but additional case histories are needed to justify widespread use of the model. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A6%2878 [...]

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