Technical Work
Level 1 Assessment
Assessment Report
Watershed Model
Model Report
Mike Model
Model Input
Model Results
Scenario Report
Instream Flow Work
Little Spokane Instream Flow Report
Middle Spokane River Instream Flow Report
WRIA 54 / 57 Spokane River Instream Flow Rpt (2.20 MB)
Appendix A (33 KB)
Appendix B (178 KB)
Appendix C (3.5 MB)
Map (Tour)
1-LSR @ Elk Park
2-Otter Creek
3-LSR @ Chattaroy
4-Dragoon Creek
5-Deadman Creek
6-LSR @ Pineriver Park
Storage Assessment

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.


Contact: Reanette Boese, Spokane County Water Resources