干旱区生态环境知识资源中心(Arid): Geospatial Modelling of Groundwater Quality in Semi-Arid Environments of South Africa

Arid

DOI	10.1007/s11270-024-07266-3
	Geospatial Modelling of Groundwater Quality in Semi-Arid Environments of South Africa
	Solomon, Henok G.; Dube, Timothy; Dalu, Tatenda
通讯作者	Dalu, T
来源期刊	WATER AIR AND SOIL POLLUTION
ISSN	0049-6979
EISSN	1573-2932
出版年	2024
卷号	235 期号:7
英文摘要	Groundwater as a scarce freshwater resource requires extensive quality assessment, control and protection through innovative methods and efficient strategies in light of growing human population, pollution, and over-extraction. Groundwater is critical in arid and semi-arid regions of the world such as the Beaufort West area in the Karoo region of South Africa. Thus, this study investigated the key processes affecting groundwater quality using factor analysis and geospatial models to determine the spatial variability of groundwater quality. To achieve this objective, groundwater samples collected from 49 boreholes located in and around the town of Beaufort West and analysed for electrical conductivity (EC), pH, total dissolved solids (TDS), calcium (Ca2+), magnesium (Mg2+), sodium (Na+), potassium (K+), bicarbonates (HCO3-), chlorides (Cl-), nitrates (NO3-) and sulphates (SO42-) using recommended standard methods. Factor analysis produced three factors explaining 81.4% of groundwater quality variation. Factor 1 (hardness) was characterised by high concentrations of Cl-, SO42-, Ca2+, Mg2+ and Na+; factor 2 (alkalinity) with HCO3- and K+, and factor 3 (anthropogenic) was characterised by high NO3- concentrations. Derived groundwater quality thematic maps using selected hydrochemical variables and factor scores showed the delineation of areas with hardness, alkalinity and anthropogenic influence on groundwater quality. These findings underscore the relevance of factor analysis and geospatial models in assessing groundwater quality at a catchment scale.
英文关键词	Arid Areas Factor Analysis Spatial Modelling Water Quality Water Resources Management
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001250365000001
WOS关键词	BASIN ; IDENTIFICATION ; CLIMATE ; SYSTEM
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405904
推荐引用方式 GB/T 7714	Solomon, Henok G.,Dube, Timothy,Dalu, Tatenda. Geospatial Modelling of Groundwater Quality in Semi-Arid Environments of South Africa[J],2024,235(7).
APA	Solomon, Henok G.,Dube, Timothy,&Dalu, Tatenda.(2024).Geospatial Modelling of Groundwater Quality in Semi-Arid Environments of South Africa.WATER AIR AND SOIL POLLUTION,235(7).
MLA	Solomon, Henok G.,et al."Geospatial Modelling of Groundwater Quality in Semi-Arid Environments of South Africa".WATER AIR AND SOIL POLLUTION 235.7(2024).