NDLI: Two universal runoff yield models: SCS vs. LCM

Content Provider	Springer Nature Link
Author	Li, Jun Liu, Changming Wang, Zhonggen Liang, Kang
Copyright Year	2015
Abstract	Runoff calculation is one of the key components in the hydrological modeling. For a certain spatial scale, runoff is a very complex nonlinear process. Currently, the runoff yield model in different hydrological models is not unique. The Chinese LCM model and the American SCS model describe runoff at the macroscopic scale, taking into account the relationship between total actual retention and total rainfall and having a certain similarity. In this study, by comparing the two runoff yield models using theoretical analyses and numerical simulations, we have found that: (1) the SCS model is a simple linear representation of the LCM model, and the LCM model reflects more significantly the nonlinearity of catchment runoff. (2) There are strict mathematical relationships between parameters (R, r) of the LCM model and between parameters (S) of the SCS model, respectively. Parameters (R, r) of the LCM can be determined using the research results of the SCS model parameters. (3) LCM model parameters (R, r) can be easily obtained by field experiments, while SCS parameters (S) are difficult to measure. Therefore, parameters (R, r) of the LCM model also can provide the foundation for the SCS model. (4) The SCS model has a linear relationship between the reciprocal of total actual retention and the reciprocal of total rainfall during runoff period. The one-order terms of a Taylor series expansion of the LCM model describe the same relationship, which is worth further study.
Starting Page	311
Ending Page	318
Page Count	8
File Format	PDF
ISSN	1009637X
Journal	Journal of Geographical Sciences
Volume Number	25
Issue Number	3
e-ISSN	18619568
Language	English
Publisher	Science Press
Publisher Date	2015-01-11
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	rainfall infiltration runoff calculation nonlinearity the SCS model the LCM model Physical Geography Nature Conservation Geographical Information Systems/Cartography Remote Sensing/Photogrammetry
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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