Watershed Monitoring and Land Use Evaluation for the Lake Decatur Watershed

Abstract

Lake Decatur is the water supply reservoir for the City of Decatur. The reservoir was created in 1922 by construction of a dam to impound the flow of the Sangamon River. The dam created a lake with a volume of 20,000 acre-feet, but was later modified in 1956 to increase the maximum capacity of the lake to 28,000 acre-feet. The drainage area of the Sangamon River upstream of Lake Decatur is 925 square miles.published or submitted for publicationis peer reviewe