Determination of Rainfall Losses in Virginia: The Effects of Urbanization

Report No: 84-R2

Published in 1983

About the report:

The effects of urbanization on the Corps of Engineers' HEC-I rainfall-runoff model parameters were examined. Data on rainfall events and corresponding streamflow hydrographs were gathered for five watersheds in rural and highly urbanized areas in Virginia. These data were used in the HEC-I program to obtain optimal estimates for the loss rate, unit hydrograph, and runoff hydrograph parameters. Regression analyses were then performed to derive prediction equations for these parameters in terms of the percent imperviousness of a watershed, which was used as the index of urbanization.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

Shaw L. Yu, Sara L. Gropen

Last updated: January 17, 2024

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