Effect of Detention Basin Release Rates on Flood Flows--Application of a Model to the Blackberry Creek Watershed in Kane County, Illinois

摘要

The purpose of this report is to document the modeling approach used to simulate flows from detention basins with specified release rates. Modeling procedures for specifying release rates from detention basins with an orifice and weir discharge configuration are discussed. To facilitate future detention modeling as a tool for watershed management, a chart relating watershed impervious area to detention volume is presented. The report also presents a case study of the Blackberry Creek watershed in Kane County, a rapidly urbanizing area seeking to avoid future flood damages from increased urbanization, to illustrate the effects of various release rates on flood peaks and volumes, and the flood frequencies.