Abstract
With various two-dimensional (2D) and now three-dimensional (3D) seepage analysis programs available it is important to understand how results from 2D and 3D models compare and when a 3D analysis may be warranted. This paper compares the results of SEEP/W © and Seep3D © software programs developed by Geo-Slope International. The project analyzed is a proposed excavation near the landside toe of the Sacramento River levee in Sacramento, California. Based on historical underseepage and through seepage emanating from this area during periods of high river stage, a seepage analysis was required by the City Building Department. The results of a 2D and 3D analysis were compared for an infinitely long excavation to calibrate the 3D model and then a limited excavation was modeled in 3D. This comparison revealed calculated seepage exit gradients 50% larger using the 3D model compared to the 2D model results.
Published Version
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