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OLS Field Name OLS Field Data
Main Title Determinants of water quality in agricultural watersheds
Author Schlosser, Isaac J.
Other Authors
Author Title of a Work
Karr, James R.
CORP Author University of Illinois at Urbana-Champaign. Water Resources Center.; United States. Dept. of the Interior.
Publisher University of Illinois, Water Resources Center,
Year Published 1980
OCLC Number 06442206
Additional Subjects Water quality ; Water in agriculture
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELDM  TD201.I3 no.147 NHEERL/MED Library/Duluth,MN 02/28/1998
Collation vi, 75 p. : ill. ; 28 cm.
Abstract
Water quality was monitored for 17 mo. in 6 different agricultural watersheds [Illinois, USA] to evaluate the impact of alterations in riparian vegetation and channel morphology. Sampling was conducted during both base flow and runoff periods. During base flows where riparian vegetation was removed, interactions between biological processes of instream organic production and hydrological processes of seasonally low flows are the primary determinants of seasonal dynamics of suspended solids, turbidity and particulate phosphorus concentrations. During runoff events, a simple model based on the KLS [based on soil erosion and slope characteristics] factors of the Universal Soil Loss Equation accurately predicts spatial patterns of suspended solids, turbidity and phosphorous levels in watersheds with a uniform channelized stream, well protected stream banks and cultivation to the stream edge. The model was not an accurate predictor where heterogeneity in riparian vegetation and channel morphology existed. The relevant theory for enhancement of water resources and for modeling water quality in agricultural watersheds varies depending on flow conditions. During base flow, emphasis should be placed on linking hydrological theory of instream transport of inorganic material to biological theory of production and transport of organic material. During runoff events, emphasis should be placed on linking of erosion predictions from agricultural theory to geomorphological theory of stream equilibrium and sediment transport.
Notes
"Final report, project no. A-093-ILL." Supported in part by the U.S. Dept. of the Interior under agreement no. 14-34-0001-9015. Bibliography: p. 68-70.