干旱区生态环境知识资源中心(Arid): Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad

Arid

DOI	10.1007/s10040-024-02765-3
	Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad
	Vogt, Marie-Louise A.; Zwahlen, Francois; Pera, Sebastian; Mahamat, Hamza Brahim; Hunkeler, Daniel; Brunner, Philip
通讯作者	Vogt, MLA
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2024
卷号	32 期号:2 页码:417-431
英文摘要	The Nubian Sandstone Aquifer System (NSAS) is one of the world's largest fossil groundwater resources. In northern Chad, notably in the areas of the Tibesti and Ennedi mountains, precipitation occurs seasonally with rates up to 150 mm year-1. This precipitation could lead to diffuse recharge, as well as concentrated recharge along the episodically flooded wadis. Although it is clear that infiltration occurs under flooded areas, it is unknown if and to what extent the infiltration can recharge groundwater. This study combines remote sensing data on precipitation, evapotranspiration, and the temporal and spatial dynamics of the flooded areas with chemical and stable isotopic data from groundwater and surface water sampled between 2013 and 2016. The combination of these data shows that (1) the only area where diffuse recharge occurs is in the southern area of the Ennedi mountains, where concentrated recharge through the wadis occurs concurrently during the month of August, and (2) southeast of the Tibesti and north of the Ennedi mountains, only concentrated recharge occurs. The length of the flooded areas and thus the spatial extent of concentrated recharge varies significantly from year to year and can last up to 3 months. The study has shown that modern recharge does occur in northern Chad, but to a very limited extent, both in space and time. This means that achieving sustainable management of this renewable resource can only be considered through rigorous quantitative assessments. Furthermore, these findings have important implications for future studies on the regional dynamics of the NSAS.
英文关键词	Chad Groundwater recharge Remote sensing Stable isotopes Arid regions
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001147698900001
WOS关键词	WATER INDEX NDWI ; GROUNDWATER ; PALEOCLIMATE ; ISOTOPE ; BASINS ; EGYPT ; SUDAN ; SIRTE ; MODEL ; KUFRA
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/2XILL650/404100
推荐引用方式 GB/T 7714	Vogt, Marie-Louise A.,Zwahlen, Francois,Pera, Sebastian,et al. Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad[J],2024,32(2):417-431.
APA	Vogt, Marie-Louise A.,Zwahlen, Francois,Pera, Sebastian,Mahamat, Hamza Brahim,Hunkeler, Daniel,&Brunner, Philip.(2024).Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad.HYDROGEOLOGY JOURNAL,32(2),417-431.
MLA	Vogt, Marie-Louise A.,et al."Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad".HYDROGEOLOGY JOURNAL 32.2(2024):417-431.