干旱区生态环境知识资源中心(Arid): Hydrometeorological study on the impact of the weather state ?Rahw? on the water resources in southwestern regions, Kingdom of Saudi Arabia

Arid

DOI	10.5004/dwt.2022.28226
	Hydrometeorological study on the impact of the weather state ?Rahw? on the water resources in southwestern regions, Kingdom of Saudi Arabia
	Mattar, Yousry; Al Ghamdi, Ahmed
通讯作者	Mattar, Y
来源期刊	DESALINATION AND WATER TREATMENT
ISSN	1944-3994
EISSN	1944-3986
出版年	2022
卷号	263 页码:175-187
英文摘要	In the arid regions, some heavy rainstorms and weather states may be happened annually and con-tinued for few to many days resulting in large, or extreme flood events. The western and southwest-ern regions in the Kingdom of Saudi Arabia (KSA); Al Madinah, Makkah, Al Bahah, Asir, Jazan, and Najran, as well as some parts of the neighboring countries such as Oman, United Arab Emirates, and Yemen have been exposed to a summer weather state which is locally named by Saudi Committee of Nomenclature of Distinguished Weather States as Rahw . This weather state lasted for 18 d started from 24 July 2020 to 10 August 2020 and resulted in moderate to heavy daily rains. The present study deals with the hydrometeorological impacts of the weather state Rahw depending upon the statis-tical analyses and ARC GIS spatial distribution of 193 rainfall and weather stations, as well as daily records of water levels in 165 constructed and under construction dams' reservoirs. The total geo-graphic areas of Al Madinah, Makkah, Al Bahah, Asir, Jazan, and Najran Regions attain 522,000 km2, representing 26.6% of the total area of KSA. According to the present study, the total geographic areas that have received rainfall precipitation in these regions during Rahw are estimated as 212,672 km2 and the average total rainfall depth over these regions only is estimated as 69.59 mm, representing 45.8% of the total annual average rainfall depth over these regions. Also, the average total rainfall depth over all KSA during Rahw is estimated as 32.56 mm, representing 30.1% of the total annual average rainfall depth over all KSA regions. On the other hand, the calculated average precipitation depth in July 2020 only, attains 32.9 mm and 9.4 rainy days, compared to 20 mm and 5 rainy days of the same month during the interval from 2010 to 2019. Also, the present study concluded that the average precipitation depth in August 2020 is estimated as 27.5 mm and 9.2 rainy days, com-pared to 27 mm rainfall depth and 7 d rainy during August in interval from 2010-2019. The total rainfall volume received during Rahw weather state estimated as 10,894 million m3 representing 20.2% of the total annual average rainfall volume in these regions, and 7.2% of the total annual aver-age rainfall volume over all KSA regions. Also, the total rainfall volume received during Rahw weather state resulted to 1,308 million m3 direct surface runoff, among of these 352 million m3 were retained behind 147 constructed dams, and 18 million m3 behind 8 under construction dams, and the remaining 938 million m3 is recharged in wadi deposits aquifers in those areas. Also, 201.6 mil-lion m3 of water was released from dams' gates to meet the demands of farmers on the down-stream of dams during the rainy state, in addition 8.3 million m3 was supplied for drinking waters and treatment plants. The net increase in the water volume behind the dams as a result of Rahw weather stations estimated as 142 million m3. The present study recommends developing and update the operational plans of dams in western and southwestern regions to maximize the benefits from the surface runoff and enhance the water resources during the occurrence of such weather states.
英文关键词	Weather state Hydrometeorology Water resources Rainfall Dams Saudi Arabia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000860724000025
WOS类目	Engineering, Chemical ; Water Resources
WOS研究方向	Engineering ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392233
推荐引用方式 GB/T 7714	Mattar, Yousry,Al Ghamdi, Ahmed. Hydrometeorological study on the impact of the weather state ?Rahw? on the water resources in southwestern regions, Kingdom of Saudi Arabia[J],2022,263:175-187.
APA	Mattar, Yousry,&Al Ghamdi, Ahmed.(2022).Hydrometeorological study on the impact of the weather state ?Rahw? on the water resources in southwestern regions, Kingdom of Saudi Arabia.DESALINATION AND WATER TREATMENT,263,175-187.
MLA	Mattar, Yousry,et al."Hydrometeorological study on the impact of the weather state ?Rahw? on the water resources in southwestern regions, Kingdom of Saudi Arabia".DESALINATION AND WATER TREATMENT 263(2022):175-187.