Document Type

Technical Report

Publication Date



Spokane River (Idaho and Wash.) -- Water quality -- Models, Water-supply -- Models, Spokane River (Idaho and Wash.) -- Water quality -- Computer simulation, Hydrologic models, Hydrodynamics -- Mathematical models


The Washington Department of Ecology is interested in a water quality model for the Upper Spokane River system for use in developing Total Maximum Daily Loads (TMDLs). The goals of this modeling effort are to:

• Gather data to construct a computer simulation model of the Spokane River system including Long Lake Reservoir and the pools behind Nine Mile dam, Upper Falls dam and Upriver dam. • Ensure that the model accurately represents the system hydrodynamics and water quality (flow, temperature, dissolved oxygen and nutrient dynamics)

This report evaluates the model calibration and discusses issues relative to that calibration effort. The calibration effort focused on model predictions of hydrodynamics (flow and water level), temperature, and eutrophication model parameters (such as nutrients, algae, dissolved oxygen, organic matter, coliform). The model calibration periods were from February 1, 1991 to October 31, 1991 and from January 1, 2000 to October 31, 2000.


Technical Report EWR-01-02 produced by College of Engineering and Computer Science Department of Civil Engineering, Portland State University.

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