干旱区生态环境知识资源中心(Arid): Revisiting recharge and sustainability of the North-Western Sahara aquifers

Arid

DOI	10.1007/s10113-020-01627-4
	Revisiting recharge and sustainability of the North-Western Sahara aquifers
	Goncalves, Julio 1; Deschamps, Pierre 1; Hamelin, Bruno 1; Vallet-Coulomb, Christine 1; Petersen, Jade 2; Chekireb, Amine 1
通讯作者	Goncalves, Julio
来源期刊	REGIONAL ENVIRONMENTAL CHANGE
ISSN	1436-3798
EISSN	1436-378X
出版年	2020
卷号	20 期号:2
英文摘要	In recent years, geochemical and geophysical studies have challenged the commonly held view that the use of fossil Sahara aquifers is completely unsustainable because they have not been recharged since the last wet period of the Holocene. Here, we use gravity data and groundwater flow modeling to provide further evidence of modern recharge of the North-Western Sahara Aquifer System (NWSAS, Algeria, Tunisia, and Libya). The rainfall-recharge relationship previously established using data from the Gravity Recovery and Climate Experiment (GRACE) allows to produce a time series of the cumulated recharge of the NWSAS between 1950 and 2016. This reconstruction yields a mean value of 1.3 km(3) year(-1) while a near-zero recharge is obtained using GRACE data for the current decade. According to our hydrogeological model, the recharge of the confined aquifer amounts to 0.3 km(3) year(-1), representing almost 25% of the overall recharge. Comparison with the time evolution of pumping rates reveals that unsustainable exploitation came fully into effect around 1980, causing a tremendous decline in natural outflows. We show here that the natural outflow of the deep aquifer at Gabes (Tunisia), which partly sustains the coastal aquifer of the Djeffara plain, will vanish in the coming decade, highlighting unsustainable aquifer exploitation. Current population growth and climate change projections are both leading to a degree of groundwater over-exploitation which can only become increasingly unsustainable. Only the enforced regulation of irrigation practices supported both by current oasis pilot experiments and future fully integrated hydro-economic models will be effective in limiting this evolution.
英文关键词	Recharge of Sahara aquifers Hydrogeological modeling Groundwater mass Balance using GRACE Sustainability of groundwater resources
类型	Article
语种	英语
国家	France ; England
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000523014300001
WOS关键词	CONTINENTAL INTERCALAIRE AQUIFER ; GROUNDWATER ; WATER ; EVOLUTION ; ISOTOPES ; CLIMATE ; AFRICA ; DESIGN ; CL-36 ; MODEL
WOS类目	Environmental Sciences ; Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315398
作者单位	1.Aix Marseille Univ, CNRS, IRD, INRAE,Coll France,CEREGE, Aix En Provence, France; 2.Thames Water, Vastern Rd, Reading RG1 8DB, Berks, England
推荐引用方式 GB/T 7714	Goncalves, Julio,Deschamps, Pierre,Hamelin, Bruno,et al. Revisiting recharge and sustainability of the North-Western Sahara aquifers[J]. French National Research Institute for Sustainable Development,2020,20(2).
APA	Goncalves, Julio,Deschamps, Pierre,Hamelin, Bruno,Vallet-Coulomb, Christine,Petersen, Jade,&Chekireb, Amine.(2020).Revisiting recharge and sustainability of the North-Western Sahara aquifers.REGIONAL ENVIRONMENTAL CHANGE,20(2).
MLA	Goncalves, Julio,et al."Revisiting recharge and sustainability of the North-Western Sahara aquifers".REGIONAL ENVIRONMENTAL CHANGE 20.2(2020).