IGSNRR OpenIR
Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China
Li Jun1; Liu Changming2
2017
Source PublicationWater Science and Engineering
ISSN1674-2370
Volume10Issue:1Pages:36
AbstractConsidering the fact that the original two-parameter LCM model can only be used to investigate rainfall losses during the runoff period because the initial abstraction is not included, the LCM model was redefined as a three-parameter model, including the initial abstraction coefficient λ, the initial abstraction Ia, and the rainfall loss coefficient R. The improved LCM model is superior to the original two-parameter model, which only includes r and R, where r is the initial rainfall loss index and can be calculated with λ using the Soil Conservation Service curve number (SCS-CN) method, with r=1/(1+λ). The trial method was used to determine the parameter values of the improved LCM model at the watershed scale for 15 flood events in the Hongde Basin in China. The results show that larger r values are associated with smaller R values, and the parameter R ranges widely from 0.5 to 2.0. In order to improve the practicability of the LCM model, r=0.833 with λ=0.2 is reasonable for simplifying calculation. When the LCM model is applied to arid and semi-arid regions, rainfall without yielding runoff should be deducted from the total rainfall for more accurate estimation of rainfall-runoff.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/98342
Collection中国科学院地理科学与资源研究所
Affiliation1.中国科学院成都山地灾害与环境研究所
2.中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Li Jun,Liu Changming. Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China[J]. Water Science and Engineering,2017,10(1):36.
APA Li Jun,&Liu Changming.(2017).Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China.Water Science and Engineering,10(1),36.
MLA Li Jun,et al."Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China".Water Science and Engineering 10.1(2017):36.
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