thumbnail

Rainfall-runoff relationships and water-quality assessment of Coon Creek watershed, Anoka County, Minnesota

Water-Resources Investigations Report 84-4013

By:
,

Links

Abstract

Rainfall-runoff relationships were studied and a water-quality assessment was done for the 96.9-square-mile Coon Creek watershed, Anoka County, Minnesota. Data were collected from March 1979 to November 1980 at three continuously recording rainfall sites, five continuously recording streamflow sites, and seven creststage sites. Hydrograph analyses showed larger peak flows, shorter times to peak, and shorter duration of high flows in streams draining urban areas than in streams draining rural areas. Constrictions at roadways resulted in attenuation of hydrograph peaks in urban areas. Eight storms produced 19 hydrographs suitable for simulation with the HEC-1 model program. Parameter-optimization techniques were used to produce synthetic hydrographs that closely resemble observed hydrographs. Linear regression was used to relate rainfall and antecedent-moisture conditions in each of the subbasins to HEC-1 input parameters, resulting in generalized models that satisfactorily match 15 of 19 observed hydrographs. Water quality was determined from 1 bottom-material and 14 water samples from each of 4 sites. Results showed that urban runoff carried the highest areally adjusted loads of several metals, chloride, dissolved solids, and suspended sediment. The highest areally adjusted loads of most nutrients were found in mainstem segments of streams in rural areas. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Rainfall-runoff relationships and water-quality assessment of Coon Creek watershed, Anoka County, Minnesota
Series title:
Water-Resources Investigations Report
Series number:
84-4013
Edition:
-
Year Published:
1985
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
iv, 97 p. :ill., maps ;28 cm.