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An advanced soil moisture accounting, procedure for SCS curve number method

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Title An advanced soil moisture accounting, procedure for SCS curve number method
 
Creator SAHU, RK
MISHRA, SK
ELDHO, TI
JAIN, MK
 
Subject rainfall-runoff models
calibration
catchment
initial soil moisture store
rainfall-runoff modelling
direct surface runoff
scs-cn method
soil moisture accounting
 
Description 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 (VO) and hence there is a scope for further improvement. Like the original method, there is sudden jump in Vo and therefore a quantum jump in computed runoff is possible. In the present study, an attempt is made to develop an expression for Vo 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 (c) 2007 , Ltd.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-16T18:35:28Z
2011-12-26T12:55:05Z
2011-12-27T05:43:40Z
2011-08-16T18:35:28Z
2011-12-26T12:55:05Z
2011-12-27T05:43:40Z
2007
 
Type Article
 
Identifier HYDROLOGICAL PROCESSES, 21(21), 2872-2881
0885-6087
http://dx.doi.org/10.1002/hyp.6503
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9587
http://hdl.handle.net/10054/9587
 
Language en