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Observation of water quality in the mixed reach below the confluence of the Sacramento and Feather Rivers, California, August and November 1975

Water-Resources Investigations Report 77-91

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Abstract

THe area near the confluence of the Sacramento and Feather Rivers, Calif., was selected for study of water-quality changes that occur when two large rivers mix. Water-quality measurements made during August 13-14 and November 4-5, 1975, indicated the mixing of the Sacramento and Feather River generally occurs as simple dilution. Specific conductance and silica had consistently larger measured values than theoretical values in the mixed reach. Some deviations from he theoretical value for any one characteristic in the mixed water are probably the result of physical forces such as upwelling near the confluence, or the concentrating effect of evaporation as the mixed water in the Sacramento River flows downstream. Other deviations in values of constituent concentrations or other properties may be the reslt of plant and animal activities. Benthic invertebrates and phytoplanktonic similarity indexes between seleted paired sites correspond to the quantity of water common to each site. (Woodard-USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Observation of water quality in the mixed reach below the confluence of the Sacramento and Feather Rivers, California, August and November 1975
Series title:
Water-Resources Investigations Report
Series number:
77-91
Edition:
-
Year Published:
1978
Language:
ENGLISH
Publisher:
U.S. Geological Survey, Water Resources Division,
Description:
iv, 34 p. :ill., maps ;27 cm.