Use of Gamma Distribution/Nash Model Further Simplified for Runoff Modeling
Publication: Journal of Hydrologic Engineering
Volume 12, Issue 2
Abstract
The use of the gamma distribution as instantaneous unit hydrograph (IUH) for modeling runoff is simple and reasonably accurate. A simplified procedure was proposed for modeling runoff using the gamma IUH, in which the incomplete gamma function was computed indirectly, but the gamma function was computed. A further simplified procedure for runoff modeling using a gamma IUH or Nash model’s IUH is proposed. This procedure does not require computation of either the gamma function or incomplete gamma function.
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References
Singh, S. K. (2000). “Transmuting synthetic unit hydrographs into gamma distribution.” J. Hydrol. Eng., 5(4), 380–385.
Singh, S. K. (2004). “Simplified use of gamma distribution/Nash model for runoff modeling.” J. Hydrol. Eng., 9(3), 240–243.
Singh, S. K. (2005). “Closure to ‘Simplified use of gamma distribution/Nash model for runoff modeling’ by Sushil K. Singh.” J. Hydrol. Eng., 11(1), 87–88.
Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 12 • Issue 2 • March 2007
Pages: 222 - 224
Copyright
© 2007 ASCE.
History
Received: Dec 23, 2004
Accepted: Jul 29, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
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Authors
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Sushil K. Singh
Scientist, National Institute of Hydrology, Jal Vigyan Bhawan, Roorkee-247 667, Uttar Anchal, India. E-mail: [email protected]
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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.