Incorporating a rainfall intensity modification factor gamma into the I-a-S Relationship in the NRCS-CN method

doi:10.1016/j.iswcr.2020.07.004

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Incorporating a rainfall intensity modification factor gamma into the I-a-S Relationship in the NRCS-CN method
	Hu, Pengcheng 1,2; Tang, Jialiang 1; Fan, Jihui 1; Shu, Shumiao 1,2; Hu, Zhaoyong 1,2; Zhu, Bo 1
刊名	INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
	2020-09-01
卷号	8 期号:3 页码:237-244
关键词	Climate change Rainfall intensity Runoff NRCS-CN method CN sensitivity
ISSN号	2095-6339
DOI	10.1016/j.iswcr.2020.07.004
通讯作者	Zhu, Bo(bzhu@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	The Natural Resources Conservation Service runoff curve number (NRCS-CN) method is widely used to simulate direct runoff, but the impact of rainfall intensity has not been considered. In this study, a rainfall intensity modification factor (gamma) was incorporated into the I-a-S relationship of the NRCS-CN method, and the modified method (NRCS-CN-gamma) was compared with the NRCS-CN method with lambda = 0.2 and lambda = 0.05 in three watersheds of the Walnut Gulch Experimental Watershed (WGEW). The results showed that for 2016-2018 period, the simulation performance of the NRCS-CN-gamma method was close to the NRCS-CN (lambda = 0.05) method and better than the NRCS-CN (lambda = 0.2) method. When the new data (2009 data with high variance) was added, the significant improvement was observed by NRCS-CN-gamma method with all the evaluation parameters being the best in the three watersheds, indicating a more adapted capability of the modified method with highly uneven rainfall intensities. The covariance between rainfall intensity and the simulated runoff were 19.01, 15.14, and 16.35 for the three methods, respectively. When the optimal CN changed, the relative errors representing CN sensitivity were 6.25, 6.49 and 17.39 for the methods, respectively. It is suggested that the NRCS-CN-gamma method outperformed the other two methods and could contribute to a more accurate estimation of direct runoff where rainfall intensity greatly varied, especially in monsoon region or under the context of climate change. (C) 2020 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. Production and Hosting by Elsevier B.V.
电子版国际标准刊号	2589-059X
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23040202] ; National Natural Science Foundation[41430750]
WOS关键词	RUNOFF CURVE NUMBER ; WALNUT-GULCH ; WATERSHEDS ; SOILS ; MODEL ; FLOW
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	KEAI PUBLISHING LTD
WOS记录号	WOS:000564216100003
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35602]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Zhu, Bo
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu 610041, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Hu, Pengcheng,Tang, Jialiang,Fan, Jihui,et al. Incorporating a rainfall intensity modification factor gamma into the I-a-S Relationship in the NRCS-CN method[J]. INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,2020,8(3):237-244.
APA	Hu, Pengcheng,Tang, Jialiang,Fan, Jihui,Shu, Shumiao,Hu, Zhaoyong,&Zhu, Bo.(2020).Incorporating a rainfall intensity modification factor gamma into the I-a-S Relationship in the NRCS-CN method.INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,8(3),237-244.
MLA	Hu, Pengcheng,et al."Incorporating a rainfall intensity modification factor gamma into the I-a-S Relationship in the NRCS-CN method".INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH 8.3(2020):237-244.