Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/15053
Title: Fréchet and chi-square parametric expressions combined with Horton ratios to derive a synthetic unit hydrograph
Authors: Bhunya P.K.
Singh P.K.
Mishra, Surendra Kumar
Published in: Hydrological Sciences Journal
Abstract: This paper explores the potential of using the density functions of the one-parameter chi-square distribution (1PCSD) and the two-parameter Fréchet distribution (2PFD) as parametric expressions for describing synthetic unit hydrographs (SUH) using geomorphological parameters of the catchment and, in particular, Horton ratios. To estimate the parameters of these two distributions, a simple analytical procedure is proposed. Finally, the suitability of these methods compared to the existing two-parameter gamma distribution (2PGD) method for SUH derivation is examined using limited field data conditions for two Indian catchments. Based on STDER criterion, 1PCSD is found to perform marginally better than 2PGD and 2PFD for Bridge catchment 253. However, for the Myntdu-Leska catchment, 2PFD performs marginally better than 2PGD and 1PCSD. The results indicate that the two density functions compared well with the popular 2PGD, indicating the equal potential of both for SUH derivation using Horton ratios. Copyright © 2009 IAHS Press.
Citation: Hydrological Sciences Journal (2009), 54(2): 274-286
URI: https://doi.org/10.1623/hysj.54.2.274
http://repository.iitr.ac.in/handle/123456789/15053
Issue Date: 2009
Keywords: Horton ratios
Probability distribution functions
Synthetic unit hydrograph
ISSN: 2626667
Author Scopus IDs: 8268278000
57208371734
55463271000
Author Affiliations: Bhunya, P.K., National Institute of Hydrology, Roorkee 247 667 Uttarakhand, India
Singh, P.K., Department of Water Resources Development and Management, Indian Institute of Technology, Roorkee 247 667 Uttarakhand, India
Mishra, S.K., Department of Water Resources Development and Management, Indian Institute of Technology, Roorkee 247 667 Uttarakhand, India
Corresponding Author: Bhunya, P.K.; National Institute of Hydrology, Roorkee 247 667 Uttarakhand, India; email: pkiitdwt@iitr.ernet.in
Appears in Collections:Journal Publications [WR]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.