干旱区生态环境知识资源中心(Arid): A unified approach for hydrological modeling of arid catchments for flood hazards assessment: case study of wadi Itwad, southwest of Saudi Arabia

Arid

DOI	10.1007/s12517-020-05430-7
	A unified approach for hydrological modeling of arid catchments for flood hazards assessment: case study of wadi Itwad, southwest of Saudi Arabia
	Elfeki, Amro 1; Masoud, Milad 2; Basahi, Jalal 1; Zaidi, Syed 2
通讯作者	Elfeki, Amro
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:12
英文摘要	A unified and systematic approach for hydrological modeling is presented for assessing flood hazards in arid and semi-arid regions with wadi Itwad as a case study. The approach consists of the following steps: (1) estimation of the design storm duration, (2) estimation of the design rainfall depth, (3) development of the design storm hyetograph, (4) setup of the watershed hydrological system, (5) infiltration tests for estimate of soil characteristics, (6) land use and land cover analysis for curve number estimation, (7) how to incorporate dams (if any) and their reservoir characteristics for reservoir routing analysis, and (8) performing hydrological modeling under different scenarios, namely: lumped with and without the effect of dams and routed scenarios. An emphasis is made on the comparison between the SCS unit hydrograph and the unit hydrograph (UH) estimated for stream flow data. The UH method produces hydrographs that are typical of arid regions. It is characterized by a steep rising limb with a short time to peak, a rapid recession to zero base flow, and less flood volume due to transmission losses. The scenarios show that the lumped case overdesigns the protection schemes, while the lumped central basin with detention dams storing the flood water completely leads to underdesign in the downstream area. The routed scenario is more realistic, since it considers the detention dams with an overflow. The runoff volume (66.6 MCM) of the 10-year return period of the routed scenario is in the order of magnitude within the observed historical data (50 to 100 MCM) reported in the literature. The study concludes that the proposed approach is robust and takes into account the Saudi arid environment while performing flood risk assessment in KSA.
英文关键词	Arid region Rainfall-runoff modeling Unit hydrograph theory Flash floods Detention dams Wadi Itwad Saudi Arabia
类型	Article
语种	英语
国家	Saudi Arabia
收录类别	SCI-E
WOS记录号	WOS:000542792100001
WOS关键词	RISK-ASSESSMENT ; BASIN ; GIS ; INFILTRATION ; REGIONS ; JEDDAH
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/2XILL650/319400
作者单位	1.King Abdulaziz Univ, Dept Hydrol & Water Resources Management, Fac Meteorol Environm & Arid Land Agr, Jeddah, Saudi Arabia; 2.King Abdulaziz Univ, Water Res Ctr, Jeddah, Saudi Arabia
推荐引用方式 GB/T 7714	Elfeki, Amro,Masoud, Milad,Basahi, Jalal,et al. A unified approach for hydrological modeling of arid catchments for flood hazards assessment: case study of wadi Itwad, southwest of Saudi Arabia[J],2020,13(12).
APA	Elfeki, Amro,Masoud, Milad,Basahi, Jalal,&Zaidi, Syed.(2020).A unified approach for hydrological modeling of arid catchments for flood hazards assessment: case study of wadi Itwad, southwest of Saudi Arabia.ARABIAN JOURNAL OF GEOSCIENCES,13(12).
MLA	Elfeki, Amro,et al."A unified approach for hydrological modeling of arid catchments for flood hazards assessment: case study of wadi Itwad, southwest of Saudi Arabia".ARABIAN JOURNAL OF GEOSCIENCES 13.12(2020).