Assessing effects of Columbia River Basin anadromous fish
Assessing effects of Columbia River Basin anadromous fish flow management on the aquatic ecology of the Henry’s Fork watershed A Proposal By The Henry’s Fork Foundation January 23, 2002
è 1. 7 mil acres in size è 235 K acres of irrigated farmland è 56 % public land è 40 K people è 3000+ mile of rivers, streams and canals
The Henry’s Fork is a regulated hydrologic system that provides water for irrigation, hydroelectricity, recreation, and flow augmentation for salmon
Providing water for multiple uses under different weather patterns results in a variety of stream flow and reservoir conditions
What happens to fish populations under various flow regimes and habitat conditions?
HFF, IDFG, and ISU fisheries research on the Henry’s Fork has focused primarily on juvenile trout survival and dispersal
Data on relationship between latewinter discharge at IP Dam and juvenile trout abundance
Project Goal: è Assess the correlation between stream flows and fish populations, and identify critical thresholds
Project Objectives Estimate spring and fall trout population size Estimate annual winter survival and dispersal Estimate egg to fry survival in Henry’s Lake Outlet Estimate upstream migration into Buffalo River Estimate habitat availability across flow regimes Correlate above estimates with flow management data Continue Long-term Synoptic Habitat Monitoring
How will the information learned from this project be used? Inside the box. . . è Inform water management decisions Outside the box…. è Guide future discussions on instream flows for fish and wildlife
- Slides: 11