Mike Model

Mike SHE is a finite difference model that is deterministic, distributed and physically based modeling system. In the Spokane Watershed Model Mike SHE is coupled with Mike 11 (a channel routing model) to provide a integrated surface water - groundwater model. The basic Mike SHE model includes six modular components; each describing a major flow process of the hydrologic cycle. These include:

• Saturated flow (3-D Boussinesq Equation)
• Unsaturated flow(1-D Richards Equation)
• Overland Flow (2-D St Venant's Equations)
• Evapotranspiration and Interception (Kristensen and Jensen)
• Snowmelt (Degree-Day)
• Channel Flow (1-D St. Venant equations)

Additionally, in the Spokane Watersheds, simulation of lawn watering, agricultural irrigation, and drywells was included. A primary benefit of the Mike SHE modeling environment is its ability to simulate groundwater and surface water interactions.