Analysis of flow reduction factors for stormwater management regulations

Document Type

Conference Proceeding

Publication Date

12-1-1998

Abstract

Two watershed models were reviewed in this study on the utilization of flow reduction factors in detention basins. The watersheds were the Middle Brook and the Devils-Cedar Brook basins in New Jersey. A flow reduction factor set of 75%, 80%, 90%, on average, was used in the Middle Brook Model with ultimate flow conditions reduced to a fraction of undeveloped conditions in the watershed. Similarly, a flow reduction factor set of 40%, 65%, 65% was used in the Devils-Cedar Brook Model with ultimate flows reduced to a fraction of existing conditions at the time of the study. A plot of ultimate to pre-ultimate flow ratios for sub-watersheds of the Middle and Devils Brooks vs. the change in impervious area from pre to ultimate conditions shows a strong correlation between the two factors. The greater the change in impervious area in the watershed, the greater the ratio of ultimate to pre-ultimate conditions. The difference in the required flow reduction factors for the two watersheds shows that each watershed will have a unique set of reduction factors to satisfy their specific design criteria.

Identifier

0032255750 (Scopus)

Publication Title

Proceedings of the International Conference on Development and Application of Computer Techniques to Environmental Studies

First Page

217

Last Page

226

This document is currently not available here.

Share

COinS