Effects of Velocity and Nutrient Alterations on Stream Primary Producers and Associated Organisms

Velocity and nutrient studies at 12 sites in Western Washington streams indicated that 50cm/sec is the critical average current velocity where the productive base of the food web is impacted. Swiftly flowing streams rich in nutrients should not be slowed to this value, and slowly flowing streams should not be altered to have velocities greater than this value.

Publication Date: 
Tuesday, October 31, 1978
Publication Number: 
WA-RD 039.2
Last modified: 
10/12/2016 - 15:40
Richard R. Horner, Eugene B. Welch.
University of Washington. Environmental Engineering and Science Program.
Number of Pages: 
Aquatic life, Construction sites, Critical velocity, Drainage, Ecosystems, Environmental impacts, Flow measurement, Food chain, Habitat (Ecology), Inorganic compounds, Organic compounds, Runoff, Streamflow, Streams, Velocity, Water quality.