Quantification of Flood Runoff Reduction Effect of Storage Facilities by the Decrease in CN
Publication: Journal of Hydrologic Engineering
Volume 18, Issue 6
Abstract
This study proposed a methodology for quantifying the flood runoff reduction effect of storage facilities by curve number (CN). The runoff hydrographs for various rainfall durations and return periods were derived using the modified rational method. The effect of runoff reduction due to the introduction of storage facilities was then quantified by CN. The result derived was summarized in a graph showing the decrease in CN as an effect of the runoff reduction with respect to the rainfall duration, return period, runoff coefficient of the catchment, and size of the storage facility. The runoff reduction effect of a storage facility was able to be easily and directly estimated using the derived graph. The result derived was also found to be well matched with the previous study for three different sites.
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Acknowledgments
This research was supported by a grant (NEMA-06-NH-03) from the Natural Hazard Mitigation Research Group, National Emergency Management Agency and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. KRF-2008-313-D01083).
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 18 • Issue 6 • June 2013
Pages: 729 - 733
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 23, 2011
Accepted: May 23, 2012
Published online: May 25, 2012
Published in print: Jun 1, 2013
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