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Relationship of nonpoint-source discharges, streamflow, and water quality in the Galena River Basin, Wisconsin

Water-Resources Investigations Report 85-4214

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Abstract

Four small tributaries of the Galena River, Wisconsin (Madden Branch tributary, Pats Creek, Apple River, and Madden Branch) that drain nonpoint agricultural sources and receive no significant point-source discharges were monitored from October 1980 through September 1982 to determine water quality. The yields of suspended solids, volatile solids, total phosphorus, and ammonia plus organic nitrogen during the 1982 water yr were at least twice the yields of the 1981 water yr. The greatest suspended solids yield was 740 tons/sq mi from the Madden Branch tributary. The greatest yields of volatile solids (70.8 tons/sq mi), total phosphorus (2,289 lb/sq mi), and ammonia plus organic nitrogen (8,529 lb/sq mi) were from the Madden Branch. The lowest annual yields of suspended solids, volatile solids, total phosphorus, and ammonia plus organic nitrogen for both years were from the Apple River. Concentrations of many constituents were very high during runoff periods. The highest concentration of ammonia nitrogen--12 mg/L--measured during the study period was in Pats Creek during spring runoff, February 21, 1982. The highest concentration of total phosphorus, 17 mg/L, was measured in Madden Branch tributary during a storm on July 10, 1982. The storm of July 10 exceeded a 100-yr recurrence interval of a 1-hr storm intensity for the area. Dissolved oxygen concentration sags were noted at three of the monitoring stations during surface runoff. Concentrations of many constituents exceeded State and Federal water quality standards. Dissolved oxygen concentrations were lower than the minimum State standard on numerous occasions at all sites except Madden Branch tributary. Most phosphorus concentrations during periods of surface runoff at all sites exceeded EPA standards. Concentrations of ammonia nitrogen potentially exceeded the Wisconsin State standard only once at Pats Creek. (Lantz-PTT)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Relationship of nonpoint-source discharges, streamflow, and water quality in the Galena River Basin, Wisconsin
Series title:
Water-Resources Investigations Report
Series number:
85-4214
Edition:
-
Year Published:
1986
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
vi, 48 p. :ill., maps ;28 cm.
Number of Pages:
54