Gridded Surface Subsurface Hydrologic Analysis (GSSHA) is a grid-based two-dimensional hydrologic model that features 2D overland flow, 1D stream flow, 1D infiltration, 2D groundwater and full coupling between the groundwater, vadoze zone, streams and overland flow. The fully coupled groundwater to surfacewater interaction allows GSSHA to model both Hortonian and Non-Hortonian basins.
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