Characteristics of stable isotope and hydrochemistry of the groundwater around Qinghai Lake, NE Qinghai-Tibet Plateau, China

Cui, Buli; Li, Xiaoyan

doi:10.1007/s12665-013-2520-y

Cited by 34 publications

(48 citation statements)

References 29 publications

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“…As previously reported, δD and δ 18 O values in the samples of the local rainfall, river water and shallow groundwater were approximately distributed along the global meteoric water line (GMWL) (Craig 1961). Consistently, three of four δD-δ 18 O data points of confined groundwater samples accompanying with surface water and shallow groundwater in the alluvial fan (section I, II) were close to the local meteoric water line (LMWL) (Xiao et al 2013;Cui and Li 2014) or GMWL, and were conspicuously heavier than the one (QH8) collected in the central basin (alluvial-lacustrine plain) (section III) ( Figure 1C). The δD-δ 18 O isotope data might indicate that recharge temperature and renewable capacity of groundwater QH10-2, QH10-4 and QH7 were relatively high, and modern water or rainfall in the piedmont zone was likely the major recharge source.…”

Section: Isotopic Geochemical Characterizationsupporting

confidence: 85%

Groundwater Microbial Communities Along a Generalized Flowpath in Nomhon Area, Qaidam Basin, China

et al. 2017

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Spatial distribution (horizonal and vertical) of groundwater microbial communities and the hydrogeochemistry in confined aquifers were studied approximately along the groundwater flow path from coteau to plain in the Nomhon area, Qinghai-Tibet plateau, China. The confined groundwater samples at different depths and locations were collected in three boreholes through a hydrogeological section in this arid and semi-arid area. The phylogenetic analysis of 16S rRNA genes and multivariate statistical analysis were used to elucidate similarities and differences between groundwater microbial communities and hydrogeochemical properties. The integrated isotopic geochemical measurements were applied to estimate the source and recharge characteristics of groundwater. The results showed that groundwater varied from fresh to saline water, and modern water to ancient water following the flowpath. The recharge characteristics of the saline water was distinct with that of fresh water. Cell abundance did not vary greatly along the hydrogeochemical zonality; however, dissimilarities in habitat-based microbial community structures were evident, changing from Betaproteobacteria in the apex of alluvial fan to Gammaproteobacteria and then to Epsilonproteobacteria in the core of the basin (alluvial-lacustrine plain). Rhodoferax, Hydrogenophaga, Pseudomonas, and bacterium isolated from similar habitats unevenly thrived in the spatially distinct fresh water environments, while Sulfurimonas dominanted in the saline water environment. The microbial communities presented likely reflected to the hydrogeochemical similarities and zonalities along groundwater flowpath.

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Section: Isotopic Geochemical Characterizationsupporting

confidence: 85%

Groundwater Microbial Communities Along a Generalized Flowpath in Nomhon Area, Qaidam Basin, China

et al. 2017

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“…(above sea level) [21]. At lower lake water levels, there is no lake outlet, and Hulun Lake is a closed, or endorheic basin, with evaporation providing the main source of water loss.…”

Section: Study Areamentioning

confidence: 99%

“…A combination of hydrochemical tracers and stable isotopes approaches can provide insight into hydrological processes, including apportionment between water sources (including groundwater contribution), and their contribution to lake water balances [16][17][18][19][20][21][22]. In particular, the increase in the values of stable isotopes in water (δ 2 H and δ 18 O) with the increasing extent of evaporative losses [23] can be incorporated into isotope-mass balance determinations to quantify water balances [24].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Role of Groundwater in a Remote Transboundary Lake (Hulun Lake, China)

Gao

Ryan

et al. 2017

Water

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Hulun Lake, located in a remote, semi-arid area in the northeast part of Inner Mongolia, China, shares a transboundary basin with Mongolia and supports a unique wetland ecosystem that includes many endangered species. Decadal scale decreases in the lake stage and increased salinity make an understanding of the lake's water and salt sources critical for appropriate design of strategies to protect and manage the lake. Multiple tracers (chloride, and δ 18 O and δ 2 H in water) in samples collected from lake water, rivers, and nearby water wells were used in conjunction with an annual water balance based on historic data to better understand the lake's major water and salt sources. The average annual water balance was conducted for two time periods : 1981-2000 and 2001-2013. The contribution of river discharge to the annual lake input decreased by half (from 64% to 31%) between the two time periods, while the volumetric contribution of groundwater discharge increased four-fold (from about 11% to about 50% of the total lake input). Significant evaporation was apparent in the stable isotope composition of the present-day lake water, however, evaporation alone could not account for the high lake water chloride concentrations. Limited domestic well water sampling, a regional salinity survey, and saline soils suggest that high chloride groundwater concentrations exist in the region south of the lake. The chloride mass balance suggested that groundwater currently contributes more than 90% of the annual chloride loading to the lake, which is likely four times greater than the earlier period (1981)(1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000) with lower groundwater input. The use of water and chloride mass balances combined with water isotope analyses could be applied to other watersheds where hydrologic information is scarce.

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“…6), the d 18 O of river water fluctuated slightly within the year. The fluctuation of d 18 O of river water was smaller than that of precipitation, especially in the dry season (between November and April), and larger than that of groundwater (Cui and Li, 2014b). These all indicated that the river water came mainly from rain during the wet season (June to September), and from interflow in the soils and groundwater during the dry season (between October and April).…”

Section: Stable Isotope In River Watersmentioning

confidence: 86%

“…Ca 2þ and Mg 2þ concentrations accounted for more than 77% of the cations (Table 2), indicating that river water chemistry was mainly controlled by carbonate weathering in the Qinghai Lake Basin (Cui and Li, 2014b). The river water TDS was lower than groundwater TDS and higher than precipitation TDS (the average TDS of groundwater and precipitation were539.05 mg/L and 68.10 mg/L, respectively; Hou et al, 2009;Cui and Li, 2014b) chemical interaction between water and rocks was lower in river water than in groundwater. However, one sample collected from the lower part of the Daotang River (location D1) had a TDS of 1014.11 mg/L (Table 2), with a hydrochemical type of Na 2þ -Cl À (Fig.…”

Section: River Water Hydrochemistrymentioning

confidence: 99%

Characteristics of stable isotope and hydrochemistry of the groundwater around Qinghai Lake, NE Qinghai-Tibet Plateau, China

Cited by 34 publications

References 29 publications

Groundwater Microbial Communities Along a Generalized Flowpath in Nomhon Area, Qaidam Basin, China

Groundwater Microbial Communities Along a Generalized Flowpath in Nomhon Area, Qaidam Basin, China

Understanding the Role of Groundwater in a Remote Transboundary Lake (Hulun Lake, China)

Runoff processes in the Qinghai Lake Basin, Northeast Qinghai-Tibet Plateau, China: Insights from stable isotope and hydrochemistry

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