STORMWATER DETENTION POND ANALYSIS

A detention pond is a small impoundment of water used for flood protection. Several methods are available to design detention ponds. The objective of this report is to investigate the design of detention pond facilities and provide Nebraska Department of Roads with a consistent, methodical procedure for evaluating and designing detention pond facilities. This report is composed of an introduction to the history of stormwater management and the policies that evolved as related to detention pond design. It also reviews literature of the existing detention pond design methods to determine the design storm, runoff volume, detention storage capacity and each of the methods' respective limitations. A simultaneous solution for the storage volume and outlet facility design is reviewed. A design example of an existing detention pond is presented for analysis and evaluation of existing methods. A recommendation and conclusion of a design method are provided for future use.