Impact of flash flood recharge on groundwater quality and its suitability in the Wadi Baysh Basin, Western Saudi Arabia: an integrated approach

被引:25
作者
Masoud, Milad H. Z. [1 ,3 ]
Basahi, Jalal M. [2 ]
Rajmohan, Natarajan [1 ]
机构
[1] King Abdulaziz Univ, Water Res Ctr, POB 80200, Jeddah 21598, Saudi Arabia
[2] King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Hydrol, POB 80200, Jeddah 21598, Saudi Arabia
[3] Desert Res Ctr, Hydrol Dept, Cairo, Egypt
关键词
Groundwater quality; Irrigation; Drinking; Livestock; Flash flood; Baysh Basin; Saudi Arabia; WATER-QUALITY; HYDROGEOCHEMICAL PROCESSES; IRRIGATION; DRINKING; ENVIRONMENT; MANAGEMENT; AQUIFER; REGION;
D O I
10.1007/s12665-018-7578-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
An integrated approach was used to evaluate the impact of flash flood recharge on groundwater quality and its suitability for drinking, irrigation, livestock and poultry uses in the Wadi Baysh Basin, Western Saudi Arabia. Analyses of 182 groundwater samples, collected from the study area before and after a flash flood (FF) event, show that the average concentrations of TDS, Mg, Na, Cl, NO3 and EC decreased significantly after the event. The major water types (mixed CaMgCl, NaCl and CaCl) indicate that the infiltration of surface water from FF recharge has a great influence on groundwater chemistry. Drinking water suitability maps, created using WHO standards, indicate that wells located in the upstream region are suitable for drinking despite their high TDS and total hardness (TH) values. Groundwater in the coastal region is unsuitable due to its high salinity, high TH and high concentrations of major ions. The suitability of groundwater for irrigational use was assessed using salinity, sodium adsorption ratio, bicarbonate hazard, residual sodium carbonate, Kelly's ratio, magnesium hazard, sodium percentage and permeability index values, which indicated that groundwater in the study region is suitable for most soils and crops. After FF, groundwater quality is improved by dilution, especially in the downstream region. USSL classification shows that the majority of the water samples are in the C3S1, C4S2, and C3S2 classes and are therefore suitable for the irrigation of salt-tolerant crops. Irrigational suitability maps suggest that wells in the upstream region are suitable for irrigation, whereas wells located near to the coast are unfit for irrigation. This study implies that construction of check dams in the dry valleys (wadies) may improve the groundwater quality in the area.
引用
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页数:19
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