Irrigation System Effects on Survival of Juvenile Spring Chinook and Other Salmonids in the Dungeness River

摘要

The Dungeness River is unique in western Washington in having irrigation water withdrawn by diversion structures, in contrast to individual pumps placed directly in the river. These diversions occur within the spawning range of the river's spring-summer chinook, early and late pinks, coho, chum, and both summer and winter steelhead. The chinook and prink runs are considered depleted. This situation, coupled with the potential value of spring chinook, has made restoration of this run a concern for Fisheries Assistance since 1981. At that time our interest was confined primarily to stock assessment.