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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14953
Title: An advanced soil moisture accounting procedure for SCS curve number method
Authors: Sahu R.K.
Mishra, Surendra Kumar
Eldho T.I.
Jain, Manoj Kumar
Published in: Hydrological Processes
Abstract: The Soil Conservation Service Curve Number (SCS-CN) method has been a topic of much discussion, especially in the last three decades. Recently, Michel et al. (2005) pointed out several inconsistencies in the soil moisture accounting (SMA) procedure used in the SCS-CN method and developed a procedure that is more consistent from the SMA viewpoint. However, the model proposed by them does not have any expression for initial soil moisture store level (V0) and hence there is a scope for further improvement. Like the original method, there is sudden jump in V0 and therefore a quantum jump in computed runoff is possible. In the present study, an attempt is made to develop an expression for V0 to make the model a continuous watershed model. Then, the performance of the new model is compared with the model proposed by Michel et al. and the original SCS-CN model by applying them in a large number of small watersheds in the United States. The present model was found to perform significantly better than both the original SCS-CN model and the model proposed by Michel et al. Copyright © 2007 John Wiley & Sons, Ltd.
Citation: Hydrological Processes (2007), 21(21): 2872-2881
URI: https://doi.org/10.1002/hyp.6503
http://repository.iitr.ac.in/handle/123456789/14953
Issue Date: 2007
Keywords: Direct surface runoff
Initial soil moisture store
Rainfall-runoff modelling
SCS-CN method
Soil moisture accounting
ISSN: 8856087
Author Scopus IDs: 57206353875
55463271000
6701641267
55555537300
Author Affiliations: Sahu, R.K., Department of Civil Engineering, Indian Institute of Technology, Mumbai-400 076 Maharashtra, India
Mishra, S.K., Department of Water Resources Development and Management, Indian Institute of Technology, Roorkee-247 667 Uttaranchal, India
Eldho, T.I., Department of Civil Engineering, Indian Institute of Technology, Mumbai-400 076 Maharashtra, India
Jain, M.K., National Institute of Hydrology, Roorkee, Uttaranchal, India
Corresponding Author: Eldho, T.I.; Department of Civil Engineering, Indian Institute of Technology, Mumbai-400 076 Maharashtra, India; email: eldho@civil.iitb.ac.in
Appears in Collections:Journal Publications [WR]

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