Regional Estimation of Storm Water Management Parameters in Florida
Publication: Journal of Water Resources Planning and Management
Volume 138, Issue 5
Abstract
Storm water management parameters that are significantly influenced by local climatic conditions are the runoff coefficient () and the water-quality volume (WQV). Two classes of methods were investigated for estimating regional variations in and WQV in Florida: interpolation methods and cluster-analysis methods. The results show that the inverse-distance-squared (IDW-2) interpolation method based on 45 reference stations distributed throughout the state provides the most accurate estimates of and WQV, with a relative mean absolute error (RMAE) of 9% in estimating and an RMAE of 13%–18% in estimating WQV. Although cluster means provide less accurate estimates of and WQV, cluster analyses show that Florida can be divided into three regions with similar values of and five regions with similar values of WQV. Cross validation shows that using cluster means instead of the IDW-2 method increases the RMAE by approximately 20% when estimating either or WQV. A site-specific example illustrates the roles of and WQV in the design of storm water management systems in Florida.
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Acknowledgments
David Baker of Environmental Research and Design, Inc. provided clarification on a previous study documented in Harper and Baker (2007).
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Information
Published In
Journal of Water Resources Planning and Management
Volume 138 • Issue 5 • September 2012
Pages: 502 - 511
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Apr 1, 2011
Accepted: Sep 22, 2011
Published online: Sep 26, 2011
Published in print: Sep 1, 2012
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