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Title:Hydrology and sedimentology modeling on Illinois agricultural watersheds
Author(s):Ewing, Loyd K.
Contributor(s):University of Illinois at Urbana-Champaign
Subject(s):Water resource development
Water resource development--Illinois
Simulation analysis
Model testing
Computer models
Land management
Watershed management
Sediment yield
Water pollution sources
Agrlcultural runoff
Geographic Coverage:Illinois (state)
Abstract:The CREAMS (Chemicals, Runoff and Erosion from Agricultural Management Systems) model was evaluated for predicting runoff and sediment delivery from central Illinois fields without calibration. CREAMS was found to be fairly accurate in predicting annual runoff and sediment delivery, if parameter values were based on the best available information. The violation of the assumption of applying CREAMS to fields having uniform characteristics, was not critical if weighted averages for parameter values were used in expressing the variability of a field. The effect of variations in parameter values on runoff and sediment delivery predicted by CREAMS was determined. This analysis identified the parameters whose values must be accurately chosen so that CREAMS can produce accurate results. The parameters related to infiltration, sheet and rill erosion, soil detachment capacity by concentrated flow, and sediment transport by overland and concentrated flow were found to produce the most variation in the prediction of runoff and sediment delivery by CREAMS.
Issue Date:1989
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Genre:Report (Grant or Annual)
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright 1989 held by Loyd K. Ewing
Date Available in IDEALS:2016-04-04

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