干旱区生态环境知识资源中心(Arid): Impact of evaporation on groundwater salinity in the arid coastal aquifer, Western Saudi Arabia

Arid

DOI	10.1016/j.catena.2020.104864
	Impact of evaporation on groundwater salinity in the arid coastal aquifer, Western Saudi Arabia
	Rajmohan, Natarajan; Masoud, Milad H. Z.; Niyazi, Burhan A. M.
通讯作者	Rajmohan, N
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	196
英文摘要	Understanding groundwater salinization and pollution in the arid coastal aquifer is crucial due to complex geochemical processes and sources. This study intends to evaluate the impact of evaporation on groundwater salinity in the arid coastal aquifer, Al Lusub basin, Saudi Arabia using geochemical and multivariate statistical tools. Groundwater samples were collected (n = 52) and analysed for major and minor ions. Groundwater is brackish and shallow wells have higher salinity compared to deeper ones. Hierarchical cluster analysis (HCA) classified the wells into three groups (CG1, CG2, CG3). In these cluster groups, salinity is in the order of CG1(1448 mg/l) < CG2 (3704 mg/l) < CG3(11018 mg/l). PHREEQC modelling reveals that groundwater in this basin is saturated with carbonate, sulphate (CG2, CG3), fluorite (CG3) and silicate minerals, and undersaturated with chloride and hydroxide minerals. Thermodynamic stability diagrams confirm the silicate weathering and kaolinite equilibrium. Precipitation of carbonate minerals at high salinity due to evaporation reduces Ca activity in the groundwater, which triggered the solubility of gypsum and fluorite through common ion effect. Pearson correlation analysis, principal component analysis, ionic ratios (Na/Cl, Cl/Br and F/Cl) and ionic deltas ( + Delta Br, + Delta F, + Delta Ca, + Delta SO4, + Delta NO3, - Delta Na and - Delta K) justified that non-saline sources and processes, namely evaporation, reverse ion exchange, mineral dissolution and wastewater infiltration predominantly affected the water chemistry in this aquifer. Repeated irrigation practice with high salinity groundwater leads to salt accumulation in the vadose zone due to evaporation, which flushed by the subsequent irrigation events and resulted in higher salinity and NO3- in the groundwater. Hence, sustainable groundwater management and smart irrigation should be implemented.
英文关键词	Groundwater Evaporation Ionic ratios Ionic delta Bromide Al Lusub basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000583955200030
WOS关键词	VOLCANO-SEDIMENTARY AQUIFER ; HYDROGEOCHEMICAL PROCESSES ; GEOCHEMICAL PROCESSES ; RAMGANGA SUBBASIN ; POLLUTION SOURCES ; NATURAL-WATERS ; DATONG BASIN ; NITRATE ; SALINIZATION ; QUALITY
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327955
作者单位	[Rajmohan, Natarajan; Masoud, Milad H. Z.; Niyazi, Burhan A. M.] King Abdulaziz Univ, Water Res Ctr, POB 80200, Jeddah 21598, Saudi Arabia; [Masoud, Milad H. Z.] Desert Res Ctr, Hydrol Dept, Cairo, Egypt
推荐引用方式 GB/T 7714	Rajmohan, Natarajan,Masoud, Milad H. Z.,Niyazi, Burhan A. M.. Impact of evaporation on groundwater salinity in the arid coastal aquifer, Western Saudi Arabia[J],2021,196.
APA	Rajmohan, Natarajan,Masoud, Milad H. Z.,&Niyazi, Burhan A. M..(2021).Impact of evaporation on groundwater salinity in the arid coastal aquifer, Western Saudi Arabia.CATENA,196.
MLA	Rajmohan, Natarajan,et al."Impact of evaporation on groundwater salinity in the arid coastal aquifer, Western Saudi Arabia".CATENA 196(2021).