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Title: A simple numerical analysis software for predicting water table height in subsurface drainage
Authors: Castanheira, Paulo
Santos, Francisco Lúcio
Keywords: subsurface drainage
numerical simulation
Issue Date: 2010
Publisher: Irrigation and Drainage Systems
Citation: Irrigation and Drainage Systems, volume 23 (2010), Number 4, 153-162
Abstract: Abstract A two dimensional saturated-unsaturated Galerkin finite element numerical model was used to predict water table height between parallel drains. A user-friendly software (DRENAFEM) was developed to allow for the calculation of the distance between drains and the water table height at middle space between drains. It also allows for determination of variations of the total head throughout the entire geometric space considered in the model. Such facts lead to the design of flow nets with streams lines and equipotentials. The numerical drain outflow is also obtained by using the radial flow equation, conservation of mass and finite element analysis. The results obtained with the model agree well with Khirkam’s and Hooghoudt analytical solution for the distribution of total head in ideal drains and for the total head calculations midway between drains.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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