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DOI | 10.1038/s41598-019-43514-x |
Water transit time and active recharge in the Sahel inferred by bomb-produced Cl-36 | |
Bouchez, Camille1,2; Deschamps, Pierre1; Goncalves, Julio1; Hamelin, Bruno1; Nour, Abdallah Mahamat1,3; Vallet-Coulomb, Christine1; Sylvestre, Florence1 | |
发表日期 | 2019 |
ISSN | 2045-2322 |
卷号 | 9 |
英文摘要 | The lack of data and suitable methods to quantify regional hydrological processes often hinders sustainable water management and adaptation to climate change in semiarid regions, particularly in the Sahel, which is known for its climatic variability. Here we show that Cl-36 from nuclear tests is a promising method to estimate water transit times and groundwater recharge rates on the catchment scale, and to distinguish water and chloride cycles. Cl-36 was measured in 131 surface and groundwater samples in the Chari-Logone sub-catchment of the emblematic Lake Chad Basin, located in central Sahel. It was found that only 12 +/- 8% of the catchment is connected to the main rivers. Groundwater supporting rivers in the upper humid part of the catchment has a mean transit time of 9.5 +/- 1 years and a recharge rate of 240 +/- 170 mm yr(-1). In the lower Sahelian part of the catchment, stream-focused recharge yields recharge rates up to 78 +/- 7 mm yr(-1) in riparian groundwater against 16 +/- 27 mm yr(-1) elsewhere. Our estimates suggest that aquifers in the Sahel host a significant amount of renewable water, which could therefore be used as a strategic freshwater resource. |
WOS研究方向 | Science & Technology - Other Topics |
来源期刊 | SCIENTIFIC REPORTS
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/97854 |
作者单位 | 1.Aix Marseille Univ, CNRS, IRD, INRA,Coll France,CEREGE, Aix En Provence, France; 2.Univ Rennes, CNRS, Geosci Rennes, UMR 6118, F-35000 Rennes, France; 3.Univ NDjamena, Dept Geol, Ndjamena, Chad |
推荐引用方式 GB/T 7714 | Bouchez, Camille,Deschamps, Pierre,Goncalves, Julio,et al. Water transit time and active recharge in the Sahel inferred by bomb-produced Cl-36[J],2019,9. |
APA | Bouchez, Camille.,Deschamps, Pierre.,Goncalves, Julio.,Hamelin, Bruno.,Nour, Abdallah Mahamat.,...&Sylvestre, Florence.(2019).Water transit time and active recharge in the Sahel inferred by bomb-produced Cl-36.SCIENTIFIC REPORTS,9. |
MLA | Bouchez, Camille,et al."Water transit time and active recharge in the Sahel inferred by bomb-produced Cl-36".SCIENTIFIC REPORTS 9(2019). |
条目包含的文件 | 条目无相关文件。 |
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