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Streamflow requirements of salmonids Public Deposited

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  • Field investigations were implemented to study the inter­relationships between streamflows and salmonid production during the summer-fall low flow period in two natural stream channels. Elk Creek, near Cannon Beach in Clatsop County, was the site selected for intensive investigation. Construction of streamflow control and diversion facilities was completed in November 1973. A wooden weir and headgate were installed on the North Fork to divert water to the West Fork through a 30-inch corrugated metal culvert pipe. Pre-flow control investigations were completed on four study sections established earlier. A total of 4800 meters of stream channel was surveyed on the two forks and permanent markers in­stalled at 30 m intervals delineating cross sectional transects. These transects were used to map stream channel morphometry, stream hydraulics, and fish cover conditions. Assessment of salmonid populations and production was completed for each study section.
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  • This project was financed in part with Anadromous Fish Act (PL 89-304) funds through the U.S. Fish & Wildlife Service.
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