Lake Water Level and Sediment Management—Case Studies in Illinois

by Ming T. Lee, Illinois State Water Survey, Champaign, IL, USA,

Document Type: Proceeding Paper

Part of: Hydraulics and Hydrology in the Small Computer Age


Estimation of the sedimentation in the lake is based on the soil erosion rates in the watershed, the sediment transport in the stream system, and lake trap efficiency. Erosion rates are most commonly estimated by using the Universal Soil Loss Equation (USLE). The sediment transport in the stream system can be estimated by using the concept of sediment delivery ratio or the sediment discharge formula. A series of case studies in Illinois are presented. The reliability of the results is assessed by comparing them with the observed field data. The future research needs for lake level assessment and sediment management are also outlined.

Subject Headings: Sediment | Lakes | Sediment transport | Water level | Water conservation | Erosion | Case studies | Soil water | Illinois | United States

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