Earth Dam and Levee Analysis with GMS


Application:Groundwater Flow Modeling
Method:Finite Element
Model Type:2D
Developer:U.S. Army Corp of Engineers


Why SEEP2D with GMS?
GMS provides a custom interface to the SEEP2D model offering a simple way to set model parameters and a graphical user interface to run the model and visualize the results. Gather background data from a variety of sources from GIS to CAD and access online data from numerous databases of maps, images, and elevation data. GMS allows you to interact with models in true 3D taking advantage of optimized OpenGL graphics and to create photo-realistic renderings and animations for PowerPoint, print, and web presentations.

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SEEP2D Description:
SEEP2D is a two-dimensional finite element groundwater model developed by Fred Tracy of the U.S. Army Engineer Waterways Experiment Station (WES). SEEP2D is designed to be used on profile models (XZ models) such as cross-sections of earth dams or levees.

SEEP2D can be used for either confined or unconfined steady state flow models. For unconfined models, there are two options for determining the phreatic surface. With the first option, the mesh is automatically truncated as the iterative solution process proceeds and when the model converges, the upper boundary of the mesh corresponds to the phreatic surface. With the second option, both saturated and unsaturated flow is simulated and the mesh is not modified. The phreatic surface can be displayed by plotting the contour line at where pressure head equals zero.

A variety of options are provided in GMS for displaying SEEP2D results. Contours of total head (equipotential lines) and flow vectors can be plotted. An option is also available for computing flow potential values at the nodes. These values can be used to plot flow lines. Together with the equipotential lines (lines of constant total head), the flow lines can be used to plot a flow net.