干旱区生态环境知识资源中心(Arid): Hydrogeological characteristics of the Omaruru Delta Aquifer System in Namibia

Arid

DOI	10.1007/s10040-018-1913-0
	Hydrogeological characteristics of the Omaruru Delta Aquifer System in Namibia
	Matengu, Brian 1,2; Xu, Yongxin 1,3; Tordiffe, Eric 4
通讯作者	Xu, Yongxin
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2019
卷号	27 期号:3 页码:857-883
英文摘要	Sustainable utilization of groundwater in parts of hyper-arid Sub-Saharan Africa, like the Namib Desert, is always a challenge due to lack of resources and data. For the Omdel Aquifer in the Omaruru catchment, Namibia, issues to investigate include the lack of information on the geology and hydrogeological setting, the hydraulic properties and geometry of the aquifer at the inflow and outflow sections, groundwater recharge conditions upstream of the aquifer, and the impact of artificial recharge. In this desert environment, the methods applied are hydrogeological surveys and site visits, together with interpretation of geological, hydrological and geomorphological data from investigations carried out to define the hydrogeological characteristics of the Omdel Aquifer. The bedrock geometry of the aquifer indicates that the Main channel (one of four palaeochannels) is the largest reservoir of stored fresh groundwater, estimated at 133Mm(3), and it is deeper than the other three channels, with an average sediment thickness of 80m. All groundwater chemistry facies of the selected boreholes tapping the Omdel Aquifer reveal a NaCl character, indicating a coastal environment. The yield of the Omdel Aquifer is estimated to have increased from 2.8Mm(3)/year before construction of a recharge enhancement dam to 4.6Mm(3)/year after the construction. This paper focuses on the understanding of hydrogeological characteristics of the Omaruru Delta Aquifer System in terms of groundwater recharge and discharge, groundwater dynamics within the aquifer and groundwater chemistry, in order to assess whether the current abstractions are operating within the hydrogeological limits of sustainability.
英文关键词	Hydrogeological characteristics Artificial recharge Coastal aquifer Sub-Saharan Africa Namibia
类型	Article
语种	英语
国家	South Africa ; Namibia ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000467483100005
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216173
作者单位	1.Univ Western Cape, Dept Earth Sci, ZA-7535 Cape Town, South Africa; 2.Namibia Water Corp Ltd, Windhoek, Namibia; 3.Hebei Univ Engn, Inst African Water Resources & Environm, Handan, Hebei, Peoples R China; 4.Karst Hydrogeol Consultants, Windhoek, Namibia
推荐引用方式 GB/T 7714	Matengu, Brian,Xu, Yongxin,Tordiffe, Eric. Hydrogeological characteristics of the Omaruru Delta Aquifer System in Namibia[J],2019,27(3):857-883.
APA	Matengu, Brian,Xu, Yongxin,&Tordiffe, Eric.(2019).Hydrogeological characteristics of the Omaruru Delta Aquifer System in Namibia.HYDROGEOLOGY JOURNAL,27(3),857-883.
MLA	Matengu, Brian,et al."Hydrogeological characteristics of the Omaruru Delta Aquifer System in Namibia".HYDROGEOLOGY JOURNAL 27.3(2019):857-883.