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Simplified two-parameter gamma distribution for derivation of synthetic unit hydrograph

Bhunya, PK; Mishra, SK and Berndtsson, Ronny LU (2003) In Journal of Hydrologic Engineering 8(4). p.226-230
Abstract
Several methods for synthetic unit hydrographs are available in the literature. Most of them involve manual, subjective fitting of a hydrograph through few data points. Because it is difficult, the generated unit hydrograph is often left unadjusted for unit runoff volume. To circumvent this problem, a simplified version of the existing two-parameter gamma distribution is introduced to derive a synthetic hydrograph more conveniently and accurately than the popular Gray, Soil Conservation Service, and Synder methods. The revised version incorporates the approximate, but accurate, empirical relations developed for the estimation of beta and lambda (factors governing the shape of the dimensionless unit hydrograph) from the Nash parameter n (=... (More)
Several methods for synthetic unit hydrographs are available in the literature. Most of them involve manual, subjective fitting of a hydrograph through few data points. Because it is difficult, the generated unit hydrograph is often left unadjusted for unit runoff volume. To circumvent this problem, a simplified version of the existing two-parameter gamma distribution is introduced to derive a synthetic hydrograph more conveniently and accurately than the popular Gray, Soil Conservation Service, and Synder methods. The revised version incorporates the approximate, but accurate, empirical relations developed for the estimation of beta and lambda (factors governing the shape of the dimensionless unit hydrograph) from the Nash parameter n (= number of reservoirs). The Marquardt algorithm was used to develop the nonlinear relationships. The applicability of the simplified version is tested on both text and field data. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
hydrographs, gamma function, parameters
in
Journal of Hydrologic Engineering
volume
8
issue
4
pages
226 - 230
publisher
American Society of Civil Engineers (ASCE)
external identifiers
  • wos:000183671300009
  • scopus:0042813557
ISSN
1084-0699
DOI
10.1061/(ASCE)1084-0699(2003)8:4(226)
language
English
LU publication?
yes
id
89ce3dfc-8116-49f9-ab93-3ad29a169d7a (old id 308499)
date added to LUP
2007-08-23 15:45:34
date last changed
2018-09-02 04:02:28
@article{89ce3dfc-8116-49f9-ab93-3ad29a169d7a,
  abstract     = {Several methods for synthetic unit hydrographs are available in the literature. Most of them involve manual, subjective fitting of a hydrograph through few data points. Because it is difficult, the generated unit hydrograph is often left unadjusted for unit runoff volume. To circumvent this problem, a simplified version of the existing two-parameter gamma distribution is introduced to derive a synthetic hydrograph more conveniently and accurately than the popular Gray, Soil Conservation Service, and Synder methods. The revised version incorporates the approximate, but accurate, empirical relations developed for the estimation of beta and lambda (factors governing the shape of the dimensionless unit hydrograph) from the Nash parameter n (= number of reservoirs). The Marquardt algorithm was used to develop the nonlinear relationships. The applicability of the simplified version is tested on both text and field data.},
  author       = {Bhunya, PK and Mishra, SK and Berndtsson, Ronny},
  issn         = {1084-0699},
  keyword      = {hydrographs,gamma function,parameters},
  language     = {eng},
  number       = {4},
  pages        = {226--230},
  publisher    = {American Society of Civil Engineers (ASCE)},
  series       = {Journal of Hydrologic Engineering},
  title        = {Simplified two-parameter gamma distribution for derivation of synthetic unit hydrograph},
  url          = {http://dx.doi.org/10.1061/(ASCE)1084-0699(2003)8:4(226)},
  volume       = {8},
  year         = {2003},
}