Volume-Based Runoff Coefficients for Urban Catchments
Publication: Journal of Irrigation and Drainage Engineering
Volume 140, Issue 2
Abstract
The rational method is derived as a special case of kinematic wave flow. The definition of runoff coefficient is expanded from the peak-based to volume-based ratio between runoff hydrograph and rainfall hyetograph. The new method presented in this paper provides a dimensionless approach to derive the runoff coefficients for the conventional two-flow drainage system and the low-impact cascading drainage systems. The key factors for the determination of runoff coefficients were identified as the ratios of depression loss and infiltration amount to the design rainfall depth. Although this method provides theoretical values for runoff coefficients, field data or computer simulation are always helpful for further validation.
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References
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 140 • Issue 2 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 4, 2013
Accepted: Oct 14, 2013
Published online: Nov 18, 2013
Published in print: Feb 1, 2014
Discussion open until: Apr 18, 2014
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