Author(s): H. Henine; Y. Nedelec
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Keywords: No Keywords
Abstract: The effect of artificial drainage on agricultural catchment outflow has been a debate for quite some time. Predicting the drainage impacts on downstream peak flow is complex because it involves different flow media: soil, drainage pipes network and open channels. In this study, an integrated modeling approach is considered to analyze water flow between soil media and buried drains' network during rain events which generate pipe pressurization and temporary retention in water table. A 1D Saint-Venant network model is associated to a 2D Boussinesq shallow water table modelThis work follows up field experiments carried out in a small subsurface drained catchment. Flow rates and pressure heads were monitored in buried pipe collector, within the drainage network, as well as water table profiles in field. Modeled and measured data for flow rates and water table profiles are compared considering the agreement with flow behavior during pressurization process.
Year: 2009