Pacific Southwest Research Station

Publication Information

Title: Cumulative effects of logging road sediment on salmonid populations in the Clearwater River, Jefferson County, Washington

Author: Cederholm, C. J.; Reid, L. M.; Salo, E. O.

Date: 1981

Source: Presented to the conference Salmon-Spawning Gravel: A Renewable Resource in the Pacific Northwest? 6-7 October 1980 Seattle Washington. 35 p.

Description: Abstract - The nature of sediment production from logging roads and the effect of the resulting sediment on salmonid spawning success in the Clearwater River drainage have been studied for eight years. The study includes intensive and extensive analyses of field situations, supplemented by several controlled experiments. It was found that significant amounts (15-25 percent) of fine sediments (less than 0.85 mm diameter material) are accumulaing in spawning gravels of some heavily roaded tributary basins. This accumulation is highest in basins where the road area exceeds 2.5 percent of the basin area.

Key Words: PSW4351, salmonid, erosion, landslides, logging

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Cederholm, C. J.; Reid, L. M.; Salo, E. O.  1981.  Cumulative effects of logging road sediment on salmonid populations in the Clearwater River, Jefferson County, Washington  Presented to the conference Salmon-Spawning Gravel: A Renewable Resource in the Pacific Northwest? 6-7 October 1980 Seattle Washington. 35 p..