干旱区生态环境知识资源中心(Arid): Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China

Arid

	Improvement of LCM model and determination of model parameters at watershed scale for flood events in Hongde Basin of China
	Li Jun; Liu Changming
来源期刊	Water Science and Engineering
ISSN	1674-2370
出版年	2017
卷号	10 期号:1 页码:36-42
英文摘要	Considering 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 l, 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 l using the Soil Conservation Service curve number (SCS-CN) method, with r ? 1=e1 t lT. 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 l ? 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.
英文关键词	LCM model SCS-CN method Rainfall-runoff Initial abstraction Partial-area runoff Determination of parameter Loess Plateau
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	CSCD
WOS研究方向	Engineering
CSCD记录号	CSCD:5978219
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335789
作者单位	Li Jun, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Key Laboratory of Mountain Hazards and Earth Surface Processes,Chinese Academy of Sciences, Chengdu, Sichuan 610041, China.; Liu Changming, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Water Cycle and Related Land Surface Processes,Chinese Academy of Sciences, Beijing 100101, China.
推荐引用方式 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],2017,10(1):36-42.
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),36-42.
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):36-42.