Research Article
Feb 1978
Estimation of Direct Runoff from Urban Watersheds
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VIEW THE REPLYAuthors: Aolad Hossain, Jacques W. Delleur, M.ASCE, and A. Ramachandra Rao, M.ASCEAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 104, Issue 2
Abstract
In the present paper, a quasilinear model of the rainfall-runoff transfer is developed by means of a regional dimensionless kernel function. The instantaneous unit hydrograph (IUH) for a specific storm on a specific watershed is obtained by rescaling the regional dimensionless kernel by using the peak discharge of the IUH, the time lag of the watershed and storm characteristics. The peak discharge of the IUH and the time lag of the watershed are obtained by the given regression relationships. The model is tested by predicting the direct runoff from an urban watershed, the data from which were not used for the calibration of the model. A nonlinear deterministic model involving two kernel functions is used to compute the direct runoff from the rainfall excess. The first and second-order kernels vary with the number of storms used. The regeneration performance of the nonlinear model was not as good as that of the quasilinear model. The runoff hydrographs are sensitive to errors in the second order kernel function.
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Published In
Journal of the Hydraulics Division
Volume 104 • Issue 2 • February 1978
Pages: 169 - 188
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Feb 1978
Published online: Feb 3, 2021
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Authors
Affiliations
Aolad Hossain
Sr. Water Quality Planner, Indiana State Board of Health, Indianapolis, Ind., USA
Jacques W. Delleur, M.ASCE
Prof., School of Civ. Engrg., Purdue Univ., West Lafayette, Ind., USA
A. Ramachandra Rao, M.ASCE
Assoc. Prof., School of Civ. Engrg., Purdue Univ., West Lafayette, Ind., USA
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.