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The Effects of Streamflow Regulation of Riparian Vegetation
Joe R. McBride, University of California, Berkeley
Jan Strahan, University of California, Berkeley
UC Water Resources Center Archives Technical Completion Report W-649
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ABSTRACT: A study of the effects of streamflow regulation on riparian vegetation focused on seedling establishment along 30
low-gradient, alluvial streams throughout central California.
Initial establishment densities were generally lower on
regulated streams than along non-regulated ones. However,
prolific establishment occurred on the recently regulated
streams as the vegetation adjusts to new stream conditions.
Seedling survival was slightly greater on regulated streams than
non-regulated ones following the 1985-1986 flooding. Survival
was much higher on both regulated and non-regulated streams
during the year of low discharges (1986-1987).
Seedling survival and growth were monitored in a controlled experiment simulating regulated and non-regulated conditions. Survival did not vary considerably among species. Growth was less in the fluctuating water level treatment than under simulated non-regulated conditions. Growth was higher for all four common species under the fluctuating treatment in a gravelly substrate but lower for cottonwood and sandbar willow in a sandy substrate.
SUGGESTED CITATION:
Joe R. McBride and Jan Strahan,
"The Effects of Streamflow Regulation of Riparian Vegetation"
(May 1, 1987).
University of California Water Resources Center.
Technical Completion Reports.
Paper 649.
http://repositories.cdlib.org/wrc/tcr/649
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