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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
Tahoe Science Projects supported by SNPLMA
Laboratory experiments on fine particle capture by submerged vegetation in stream environment zones (SEZs): the effects of vegetation density, biofilm development and particle composition
Final Report [pdf]
Please contact Dr. Geoff Schladow with questions regarding the final report.
This study focused on the measurement of fine particle capture efficiencies in a laboratory flume using analogs of the vegetation present in an SEZ. As has been demonstrated in preliminary tests, the laboratory flume offers the ability to vary flow rate, substrate density (stems per square meter), stem width, particle concentration, and presence/absence of biofilms (biological surface coatings) in a repeatable fashion and to measure the changing particle size distribution and particle concentration over time. The size-specific removal efficiencies that can be calculated in this fashion can then be used as the basis of assigning removal efficiencies in any SEZ in the Tahoe Basin based on site-specific flowrate, vegetation type and density, and initial particle concentration. Alternatively, the values could be used as part of a comprehensive stream/SEZ model and provide more detailed estimates of the effectiveness of SEZs in achieving restoration goals.
|Last Modified: Nov 25, 2014 04:02:35 PM|