||Water Quality in Agricultural Watersheds: Impact of Riparian Vegetation during Base Flow.
Schlosser, Isaac J. ;
Karr, James R. ;
||Illinois Univ. at Urbana-Champaign.;Corvallis Environmental Research Lab., OR.
Stream pollution ;
Seasonal variations ;
Biological productivity ;
Base flow ;
Agricultural watersheds ;
Suspended solids ;
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Water quality was monitored for 17 months during base flow periods in six agricultural watersheds to evaluate the impact of riparian vegetation on suspended solids and nutrient concentrations. In areas without riparian vegetation, both instream algal production and seasonal low flows appeared to be major determinants of suspended solids, turbidity, and phosphorus concentrations. Peak levels of all parameters were reached during the summer when flows were reduced and benthic algal production was high.