干旱区生态环境知识资源中心(Arid): Statistical analysis of NRCS curve number (NRCS-CN) in arid basins based on historical data

Arid

DOI	10.1007/s12517-019-4993-9
	Statistical analysis of NRCS curve number (NRCS-CN) in arid basins based on historical data
	Farran, Mohammed M.; Elfeki, Amro M.
通讯作者	Farran, Mohammed M.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:1
英文摘要	CN method is a commonly used technique for estimation of direct runoff for flood mitigation studies. In Saudi Arabian (SA) arid basins, there is no analysis of NRCS-CN obtained from measured rainfall-runoff events. The research objectives are to find out the actual range of CN values in arid basins, the statistical distribution of CN, the confidence intervals of CNs, and the relation between the CN and initial abstraction factor, lambda. Five basins with 19 sub-basins located in the southwest of Saudi Arabia were considered, and 161 rainfall-runoff events were analyzed during the period 1984-1987. The least squares method was used to obtain the optimum range of values for lambda and CN based on three estimation methods. The rainfall and runoff exhibited log-normal distribution. The analysis showed that CN varied between 45 and 85 at lambda = 0.2. The low CN values account for the transmission losses which is a typical phenomenon in arid regions. The initial abstraction ratio lambda = 0.01 is found to be more representative to arid basins rather than lambda = 0.2. The Beta distribution is the best to fit CN at both lambda = 0.2 and 0.01. The confidence intervals are estimated and tabulated at different significant levels for flood risk assessment studies in arid basins.
英文关键词	NRCS-CN method Curve number Least square method Arid regions Initial abstraction Flood studies
类型	Article
语种	英语
国家	Saudi Arabia
收录类别	SCI-E
WOS记录号	WOS:000513245900002
WOS关键词	RAINFALL-RUNOFF DATA ; INITIAL ABSTRACTION ; WATERSHEDS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314066
作者单位	King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Hydrol & Water Resources Management, Jeddah, Saudi Arabia
推荐引用方式 GB/T 7714	Farran, Mohammed M.,Elfeki, Amro M.. Statistical analysis of NRCS curve number (NRCS-CN) in arid basins based on historical data[J],2020,13(1).
APA	Farran, Mohammed M.,&Elfeki, Amro M..(2020).Statistical analysis of NRCS curve number (NRCS-CN) in arid basins based on historical data.ARABIAN JOURNAL OF GEOSCIENCES,13(1).
MLA	Farran, Mohammed M.,et al."Statistical analysis of NRCS curve number (NRCS-CN) in arid basins based on historical data".ARABIAN JOURNAL OF GEOSCIENCES 13.1(2020).