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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14952
Title: A variable storage coefficient model for rainfall-runoff computation
Authors: Bhunya P.K.
Singh P.K.
Mishra S.K.
Panigrahy N.
Published in: Hydrological Sciences Journal
Abstract: The study explores the suitability of a two-reservoir variable storage coefficient (2VSC) model with respect to the popular two-parameter gamma distribution (2PGD) model (Nash, 1957) for direct runoff hydrograph (DRH) derivation from a small test catchment. The proposed model is based on the concept of VSC that utilizes a varying storage coefficient K (by ratio r) instead of a uniform storage coefficient K as in the 2PGD model. Further, the proposed model uses unit-step rainfall instead of unit-impulse as input. The results show the 2PGD model to respond faster to a given amount of input (excess rainfall) than the 2VSC model. Based on the results it is found that the 2VSC model performs significantly better than the 2PGD model in deriving the shape of the direct runoff hydrograph. However, for a comparatively larger catchment the 2PGD model performs better than the 2VSC model. Similar to the 2PGD model, the 2VSC model has potential for synthetic unit hydrograph derivation. Copyright © 2008 IAHS Press.
Citation: Hydrological Sciences Journal (2008), 53(2): 338-352
URI: https://doi.org/10.1623/hysj.53.2.338
http://repository.iitr.ac.in/handle/123456789/14952
Issue Date: 2008
Keywords: Conceptual
Direct runoff hydrograph
Gamma distribution
Rainfall-runoff
Variable storage coefficient
ISSN: 2626667
Author Scopus IDs: 8268278000
57208371734
55463271000
7801572145
Author Affiliations: Bhunya, P.K., National Institute of Hydrology, Roorkee 247667 Uttaranchal, India
Singh, P.K., Department of Water Resources Development and Management, Indian Institute of Technology Roorkee, Roorkee 247667 Uttaranchal, India
Mishra, S.K., Department of Water Resources Development and Management, Indian Institute of Technology Roorkee, Roorkee 247667 Uttaranchal, India
Panigrahy, N., National Institute of Hydrology, Roorkee 247667 Uttaranchal, India
Corresponding Author: Bhunya, P.K.; National Institute of Hydrology, Roorkee 247667 Uttaranchal, India
Appears in Collections:Journal Publications [WR]

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