Arid
DOI10.1007/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
ISSN1866-7511
EISSN1866-7538
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
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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).
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