Hydrology and sedimentology modeling on Illinois agricultural watersheds

Ewing, Loyd K.

Permalink

https://hdl.handle.net/2142/89767 Copy

Description

Title

Hydrology and sedimentology modeling on Illinois agricultural watersheds

Author(s)

Ewing, Loyd K.

Contributor(s)

University of Illinois at Urbana-Champaign

Issue Date

1989

Keyword(s)

• Water resource development
• Water resource development--Illinois
• Agriculture
• 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.

Publisher

University of Illinois at Urbana-Champaign. Water Resources Center

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/89767

Sponsor(s)/Grant Number(s)

• U.S. Department of the Interior
• U.S. Geological Survey

Copyright and License Information

Copyright 1989 held by Loyd K. Ewing

Owning Collections