EWN Tools

Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model

About This Tool

Gridded Surface Subsurface Hydrologic Analysis (GSSHA) is a physics-based, distributed, hydrologic, sediment and constituent fate and transport model. Features include two dimensional (2-D) overland flow, 1-D stream flow, 1-D infiltration, 2-D groundwater, and full coupling between the groundwater, shallow soils, streams, and overland flow. Sediment and constituent fate and transport are simulated in the shallow soils, overland flow plane, and in streams and channels. GSSHA can be used as an episodic or continuous model where soil surface moisture, groundwater levels, stream interactions, and constituent fate are continuously simulated. The fully coupled groundwater to surface-water interaction allows GSSHA to model basins in both arid and humid environments.

Related Events

This training event took place on 6-7 September 2023 in Norman, Oklahoma, sponsored by the U.S. Army Corps of Enginee...

Point of Contact

Research Civil Engineer, Coastal and Hydraulics Laboratory, ERDC


EWN Tools

Research Use Cases

Projects that utilize “Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model”
This project creates guidance and training materials on how to apply EWN® principles in GSSHA as an integral part of a holistic watershed management plan. By demonstrating the techniques and approaches, and providing ...