干旱区生态环境知识资源中心(Arid): Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa

Arid

DOI	10.1016/j.pce.2019.09.003
	Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa
	Erdogan, I. G.1,2,3; Fosso-Kankeu, E.1; Ntwampe, S. K. O.2,3; Waanders, F. B.1; Hoth, N.4; Rand, A.2
通讯作者	Erdogan, I. G.
来源期刊	PHYSICS AND CHEMISTRY OF THE EARTH
ISSN	1474-7065
EISSN	1873-5193
出版年	2019
卷号	114
英文摘要	Water insecurity is a growing concern globally and the role of groundwater and aquifers in buffering the effects of climate variability and change is increasingly acknowledged due to extended periods of drought in arid regions. Water security can only be fully realised with a more robust understanding of groundwater as a water resource, especially in the O'Kiep area which is in Namaqualand, South Africa. Results of analyses of groundwater samples (n = 8) indicated that pH values met acceptable standards for drinking, while the total dissolved solids (TDS) and electrical conductivity (EC) were however not within the recommended limits. The chemical composition of the groundwater indicated Eh values -34.1 to -87.2 mV, indicative of reducing geochemical conditions with the most abundant ions being Cl-, SO42-, NO3-, F-, Na+, Ca2+, Mg2+ and K+. Furthermore, some of the ions were not within the guidelines, i.e. Cl-, SO42+, Na+, Ca2+ and Mg2+, but all the potential toxic elements, namely: Al, S, As, Cd, Cr, Co, Cu, Fe, Mn, Hg, Ni, Se, V, Zn and CN, were within acceptable values for drinking groundwater as recommended by the SANS241-1 (2015) and WHO (2011). Hydrogeochemical characteristics of the water indicated that the continuous consumption of the groundwater without pretreatment might result in possible human health risk as the Groundwater Quality Index (GWQI) confirmed that the groundwater quality could be classified as being of moderate concern. Furthermore, the hydrogeochemical indices (CaCO3/Cl and Mg/Ca) and cationic exchange values indicated that the aquifer is of inland origin while the piper trilinear diagram revealed that the groundwater type in the area is categorised as sodium - potassium - chloride - sulphate- (Na-K-Cl-SO4), carbonate - chloride - sulphate- (CaCO3-Cl-SO4) and sodium - chloride (Na-Cl) type water. Additionally, the Sodium Adsorption Ratio (SAR) values up to 11.7 indicated that the groundwater is brackish and its excessive usage may have undesirable effect on plant growth. Therefore, this study recommends the consideration of suitable measures to improve the GWQI for the benefit of the community which have access to limited water resources.
英文关键词	Arid region Hydrogeochemical characteristics Groundwater quality index O'Kiep
类型	Article
语种	英语
国家	South Africa ; Germany
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000500938000012
WOS关键词	HEALTH-RISK ASSESSMENT ; COPPER DISTRICT ; EAST SINGHBHUM ; SULFIDE ORES ; RIVER-BASIN ; QUALITY ; OOKIEP ; VULNERABILITY ; PETROGENESIS ; JHARKHAND
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311437
作者单位	1.North West Univ, Water Pollut Monitoring & Remediat Initiatives Re, Sch Chem & Minerals Engn CoE C Based Fuels, Potchefstroom, South Africa; 2.Cape Peninsula Univ Technol, Bioresource Engn Res Grp BioERG, Cape Town, South Africa; 3.Cape Peninsula Univ Technol, Fac Engn, Chem Engn Dept, Cape Town, South Africa; 4.Tech Univ Bergakad Freiberg, Inst Min & Special Civil Engn, Saxony, Germany
推荐引用方式 GB/T 7714	Erdogan, I. G.,Fosso-Kankeu, E.,Ntwampe, S. K. O.,et al. Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa[J],2019,114.
APA	Erdogan, I. G.,Fosso-Kankeu, E.,Ntwampe, S. K. O.,Waanders, F. B.,Hoth, N.,&Rand, A..(2019).Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa.PHYSICS AND CHEMISTRY OF THE EARTH,114.
MLA	Erdogan, I. G.,et al."Groundwater as an alternative source to irregular surface water in the O'Kiep area, Namaqualand, South Africa".PHYSICS AND CHEMISTRY OF THE EARTH 114(2019).