caa a22 4500 445874694 CHVBK 20180317145524.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10652-010-9196-6 doi (NATIONALLICENCE)springer-10.1007/s10652-010-9196-6 Castro-Orgaz Oscar Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Cientificas, Finca Alameda del Obispo, 14080, Cordoba, Spain aut A new model for soil-water drainage problems [Elektronische Daten] [Oscar Castro-Orgaz] Seepage flow is an agent related to the transport and dispersion of contamination in groundwater. Steady two-dimensional seepage flow is governed by Laplace's equation, for which several solution techniques are available. Because computations are complex from a practical point of view, simplified models encompass the Dupuit-Forchheimer approach assuming a horizontal flow. However this approach is inaccurate in seepage problems involving steep drawdowns. In this research, a new theoretical model for 2D seepage flow is proposed based on Fawer's theory for curved flows Castro-Orgaz (Environ Fluid Mech 10(3):2971-2310, 2010), from which a second-order equation results describing the seepage surface. From this development, a numerical solution for the rectangular dam problem based on the second-order model is presented, whereas a simple first-order equation is found to describe flow to drains under a uniform rainfall. The results of this new model are compared with the full 2D solution of Laplace's equation for typical test cases, resulting in an excellent agreement. Springer Science+Business Media B.V., 2010 Dam nationallicence Drains nationallicence Flow net nationallicence Seepage nationallicence Two-dimensional flow nationallicence Environmental Fluid Mechanics Springer Netherlands 11/4(2011-08-01), 427-435 1567-7419 11:4<427 2011 11 10652 https://doi.org/10.1007/s10652-010-9196-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10652-010-9196-6 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Castro-Orgaz Oscar Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Cientificas, Finca Alameda del Obispo, 14080, Cordoba, Spain aut NATIONALLICENCE 773 0- Environmental Fluid Mechanics Springer Netherlands 11/4(2011-08-01), 427-435 1567-7419 11:4<427 2011 11 10652 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer