干旱区生态环境知识资源中心(Arid): Using Stable Isotopes to Assess Groundwater Recharge and Solute Transport in a Density-Driven Flow-Dominated Lake-Aquifer System

Arid

DOI	10.3390/w14101628
	Using Stable Isotopes to Assess Groundwater Recharge and Solute Transport in a Density-Driven Flow-Dominated Lake-Aquifer System
	Valiente, Nicolas; Dountcheva, Iordanka; Sanz, David; Jose Gomez-Alday, Juan
通讯作者	Valiente, N
来源期刊	WATER
EISSN	2073-4441
出版年	2022
卷号	14 期号:10
英文摘要	Saline lakes are mostly located in endorheic basins in arid and semi-arid regions, where the excess of evaporation over precipitation promotes the accumulation of salts on the surface. As the salinity of these lakes increases, their mass balance changes, and biogeochemical processes may be intensified. In that sense, Petrola Lake (SE Spain) is a terminal lake located in an endorheic basin with elevated anthropic pressure, mainly derived from agricultural inputs and wastewater discharge. The goal of this study was to evaluate the interaction between groundwater and saline water from Petrola Lake to improve our knowledge of groundwater recharge processes by density-driven flow (DDF) in terminal lakes. A combination of hydrochemical (chloride concentration) and stable isotope (delta18OH2O and delta2HH2O) data were used. In order to test the conceptual model, a simple numerical experiment was performed using a one-dimensional column that represents the relationship between the lake and the aquifer incorporating the variable density coupling control in solute migration. The isotopic composition of 190 groundwater and surface water samples collected between September 2008 and July 2015 provides a regression line (delta2HH2O = 5.0 center dot delta18OH2O - 14.3 parts per thousand, R2 = 0.95) consistent with dominant evaporation processes in the lake. The DDF towards the underlying aquifer showed a strong influence on the mixing processes between the groundwater and surface water. Nevertheless, groundwater chemistry at different depths beneath the lake remains almost constant over time, suggesting an equilibrium between DDF and regional groundwater flow (RGF). Modelling isotope changes allowed inferring the temporal pattern of saline water recharge, coinciding with the summer season when water loss through evaporation is most significant. Consequently, the transport of solutes suitable for chemical reactions is then feasible to deeper zones of the aquifer.
英文关键词	saline lake density-driven flow stable isotopes groundwater recharge solute transport
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000804119400001
WOS关键词	HYPERSALINE LAKE ; WATER ; PRECIPITATION ; HYDROGEN ; SPAIN ; BASIN ; O-18 ; FRACTIONATION ; CONVECTION ; HYDROLOGY
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394790
推荐引用方式 GB/T 7714	Valiente, Nicolas,Dountcheva, Iordanka,Sanz, David,et al. Using Stable Isotopes to Assess Groundwater Recharge and Solute Transport in a Density-Driven Flow-Dominated Lake-Aquifer System[J],2022,14(10).
APA	Valiente, Nicolas,Dountcheva, Iordanka,Sanz, David,&Jose Gomez-Alday, Juan.(2022).Using Stable Isotopes to Assess Groundwater Recharge and Solute Transport in a Density-Driven Flow-Dominated Lake-Aquifer System.WATER,14(10).
MLA	Valiente, Nicolas,et al."Using Stable Isotopes to Assess Groundwater Recharge and Solute Transport in a Density-Driven Flow-Dominated Lake-Aquifer System".WATER 14.10(2022).