Publication Summary

The Washington State Department of Ecology conducted an instream flow study in the Entiat River using the Instream Flow Incremental Methodology. The study provides information about the relationship between streamflows and fish habitat which can be used in developing minimum instream flow requirements for fish in the Entiat and Mad Rivers. Two sites, each composed of six transects, were chosen to represent the upper and lower Entiat River. The sites were located at River Miles 16.2 and 1.0, respectively. On the Mad River, one site composed of eight transects at River Mile 1.0 was chosen to represent the river. Streamflow measurements and substrate information were recorded at high, medium and low flows.