干旱区生态环境知识资源中心(Arid): Estimating water fluxes in the critical zone using water stable isotope approaches in the Groundnut and Ferlo basins of Senegal

Arid

DOI	10.1002/hyp.14787
	Estimating water fluxes in the critical zone using water stable isotope approaches in the Groundnut and Ferlo basins of Senegal
	Diongue, Djim M. L.; Stumpp, Christine; Roupsard, Olivier; Orange, Didier; Do, Frederic C. C.; Faye, Serigne
通讯作者	Diongue, DML
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2023
卷号	37 期号:1
英文摘要	Sustainable water management in semi-arid agriculture practices requires quantitative knowledge of water fluxes within the soil-vegetation-atmosphere system. Therefore, we used stable-isotope approaches to evaluate evaporation (E-a), transpiration (T-a), and groundwater recharge (R) at sites in Senegal's Groundnut basin and Ferlo Valley pasture region during the pre-monsoon, monsoon, and post-monsoon seasons of 2021. The approaches were based upon (i) the isothermal evaporation model (for quantifying E-a); (ii) water and isotope mass balances (to partition E-a and T-a for groundnut and pasture); and (iii) the piston displacement method (for estimating R). E-a losses derived from the isothermal evaporation model corresponded primarily to Stage II evaporation, and ranged from 0.02 to 0.09 mm d(-1) in the Groundnut basin, versus 0.02-0.11 mm d(-1) in Ferlo. At the groundnut site, E-a rates ranged from 0.01 to 0.69 mm d(-1); T-a was in the range 0.55-2.29 mm d(-1); and the T-a/ETa ratio was 74%-90%. At the pasture site, the ranges were 0.02-0.39 mm d(-1) for E-a; 0.9-1.69 mm d(-1) for T-a; and 62-90% for T-a/ETa. The ETa value derived for the groundnut site via the isotope approach was similar to those from eddy covariance measurements, and also to the results from the previous validated HYDRUS-1D model. However, the HYDRUS-1D model gave a lower T-a/ETa ratio (23.2%). The computed groundwater recharge for the groundnut site amounted to less than 2% of the local annual precipitation. Recommendations are made regarding protocols for preventing changes to isotopic compositions of water in samples that are collected in remote arid regions, but must be analysed days later. The article ends with suggestions for studies to follow up on evidence that local aquifers are being recharged via preferential pathways.
英文关键词	evapotranspiration recharge semi-arid stable isotopes water balance
类型	Article
语种	英语
开放获取类型	Green Submitted, Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000906093200001
WOS关键词	ESTIMATING GROUNDWATER RECHARGE ; DELTA-O-18 DEPTH PROFILES ; PEANUT ARACHIS-HYPOGAEA ; SOIL-WATER ; PARTITIONING EVAPOTRANSPIRATION ; HYDRAULIC REDISTRIBUTION ; TRANSPIRATION EFFICIENCY ; HYDROGEN ISOTOPES ; OXYGEN-ISOTOPE ; PLANT WATER
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396865
推荐引用方式 GB/T 7714	Diongue, Djim M. L.,Stumpp, Christine,Roupsard, Olivier,et al. Estimating water fluxes in the critical zone using water stable isotope approaches in the Groundnut and Ferlo basins of Senegal[J],2023,37(1).
APA	Diongue, Djim M. L.,Stumpp, Christine,Roupsard, Olivier,Orange, Didier,Do, Frederic C. C.,&Faye, Serigne.(2023).Estimating water fluxes in the critical zone using water stable isotope approaches in the Groundnut and Ferlo basins of Senegal.HYDROLOGICAL PROCESSES,37(1).
MLA	Diongue, Djim M. L.,et al."Estimating water fluxes in the critical zone using water stable isotope approaches in the Groundnut and Ferlo basins of Senegal".HYDROLOGICAL PROCESSES 37.1(2023).