Water resources in inland regions of central Asia: Evidence from stable isotope tracing

Li, Zongxing; Gui, Jian‐Fang; Wang, Xufeng; Feng, Qi; Zhao, Tongtiegang; Ouyang, Canbin; Guo, Xulin; Zhang, Baijuan; Shi, Yang

doi:10.1016/j.jhydrol.2019.01.003

Cited by 68 publications

(34 citation statements)

References 41 publications

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“…Overall, the findings from the stable isotopes provide insights into hydrological processes and offer a platform to understand mountainous water cycle in arid areas. stable isotopes in water bodies have been studied for different areas of the Qilian Mountains [5,[13][14][15][16][17]. However, a comprehensive investigation of the different water bodies, from precipitation to surface, soil, and plant waters (sometimes known as soil-plant-atmosphere continuum, SPAC), is still limited, since most isotope sampling studies have only been conducted once or over a very short period of time.…”

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confidence: 99%

Water Stable Isotopes in an Alpine Setting of the Northeastern Tibetan Plateau

Qiu

Zhang

Wang

et al. 2019

Water

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Hydrological processes produce effects on water resources in inland mountainous regions. To perform a comprehensive investigation of the important segments of the water cycle, using the Qilian Mountains as a case study, precipitation, soil, plant, river, and groundwater were collected during the plant growing season of 2016. All samples were collected on a monthly basis, except precipitation, which was collected on a per event basis. The results showed that: the “temperature effect” was apparent, which suggested a drier climate background; there were differences in the slope and intercept of the local meteoric water line, using different regression methods; and the δ18O of soil water varied greatly in the topsoil, tended to be similar in the deep soil, and became increasingly depleted as the soil depth increased. The responses of the soil water isotopes to precipitation pulses had different boundaries. The major water source for Caragana Fabr. in no-precipitation month was located in the 0–30 cm soil layer, but was different in months when precipitation occurred. Overall, the findings from the stable isotopes provide insights into hydrological processes and offer a platform to understand mountainous water cycle in arid areas.

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confidence: 99%

Water Stable Isotopes in an Alpine Setting of the Northeastern Tibetan Plateau

Qiu

Zhang

Wang

et al. 2019

Water

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“…The stable isotope composition of water was reported with reference to the Vienna Standard Mean Ocean Water (V-SMOW). Specifically, the δ 18 O and δD in the samples were measured at the MLR Key Laboratory of Karst Dynamics, Guilin, using a liquid water isotope analyzer (LWIA-24d, Los Gatos) with a precision of 0.2‰ for δ 18 O and of 0.6‰ for δD.…”

Section: Isotopic and Chemical Analysesmentioning

confidence: 99%

“…The δD content has a linear relationship with the δ 18 The GMWL is essentially the global average of many local meteoric water lines (LMWLs), each controlled by local climatic factors like the origin of the vapor mass, secondary evaporation during precipitation, and the seasonality of precipitation. These local factors affect both the deuterium excess and the slope.…”

Section: δ 18 O and δD Variations In Streams And Springsmentioning

confidence: 99%

“…The content variations of environmental isotopes of oxygen (δ 18 O) and hydrogen (δD) are natural markings that facilitate the understanding of the entire change process of oxygen and hydrogen isotopes: evaporation, condensation, raindrop formation, and aquifer infiltration. These two isotopes have been widely employed to study hydrogeological processes within the hydrologic cycle [9][10][11][12], such as precipitation, groundwater recharge, groundwater-surface water interaction, and basin hydrology [9,13,14], distinguish the source and pathways of streams and groundwater recharge [2,15], and evaluate the dynamics of surface water and groundwater, evaporation of water bodies, and the mixing between various water sources [7,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…This paper investigates the transformation relationship between surface water and groundwater, and the geochemical and hydrologic cycle in karst mountains, Xiangxi River Basin, Hubei Province, based on the spatiotemporal distribution of δD and δ 18 O in relevant streams and springs. In addition, the authors summarized the spatiotemporal distribution of water resources in the study area, as well as the pattern of sustainable development for such resources.…”

Section: Introductionmentioning

confidence: 99%

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Features of Oxygen and Hydrogen Isotopes in Waters from the Karst Mountains, Xiangxi River Basin

Shi¹,

Chen²,

Wang³

et al. 2020

IJDNE

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Targeting the carbonate-dominated catchment of Xiangxi River, the first tributary of Three Gorges Reservoir, this paper explores the spatiotemporal distribution of stable isotopes in the stream water, and distinguishes the water sources and recharge processes in the river basin. Multiple water samples were collected from the catchments of the main tributaries of Xiangxi River, namely, Nanyang River and Gaolan River. The results show that the two tributary catchments had obvious spatial and seasonable variability in δ18O and δD. This is attributable to the seasonal changes in meteoric precipitation recharge, which depends on ambient temperature, precipitation, evaporation, and secondary evaporation of raindrops. Besides, there is a strong elevation effect on stable isotopes in stream water. In the samples from Gaolan River, the mean elevation effect on the δ18O and δD was -0.35‰, and -1.57‰ per 100m change in elevation in summer, and -0.12‰, and -1.19‰ per 100m change in elevation in winter, respectively. In the samples from Nanyang River, the mean elevation effect on the δ18O and δD was -0.14‰ and -0.89‰ per 100m change in elevation in summer, and -0.08‰ and -0.66‰ per 100m change in elevation in winter, respectively. The δD, δ18O, and deuterium excess (d-value) are not only affected by the elevation effect, but also by the seasonal effect in the study area. The seasonal variations and spatial changes in the tributary catchments reveal the difference between the two catchments in control factors like latitude effect, evaporation, and the mixing of different water sources.

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Stable isotopes of surface water and groundwater in a typical subtropical basin in south‐central China: Insights into the young water fraction and its seasonal origin

Xiao

Zhang

et al. 2022

Hydrological Processes

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The young water fraction (Fyw) can be reliably determined in heterogeneous river basins, and the seasonal origin index (SOI) can be used to determine the relative contributions of winter versus summer precipitation to runoff. Fywand SOI are also important descriptors of how a basin controls runoff generation and the transport of contaminants and nutrients. In this study, high‐frequency sampling of precipitation, river water, creek water, and shallow groundwater was conducted in the Xiangjiang River basin, in south‐central China, from January 2010 to December 2012. The samples were subjected to stable isotope measurements to determine the SOI and Fywof surface water and shallow groundwater. The principal findings are: (1) The δ2H variations of the river water, creek water, and shallow groundwater were driven by the input of precipitation but were attenuated during runoff confluence processes. Also, the low lc‐excess values of the river water indicated a strong evaporative effect. (2) 21.4% and 19.7% of the river water and shallow groundwater were younger than 1.5 and 1.7 months, respectively, indicating a quicker renewal cycle than for the creek water, which had a fraction of 8.0% younger than 2.6 months, which originated from the adjacent mountains. (3) Winter precipitation was more prevalent in the river water and creek water, indicating the substantial inter‐seasonal carryover of precipitation that supplied the runoff. The average SOI value of the shallow groundwater was near zero, indicating the mixing of the precipitation in different seasons that supplies the shallow groundwater. Our findings emphasize the importance of vegetation and soil conservation in maintaining the inter‐seasonal carryover of water storage held by soil, plants, and rock fractures, and the necessity to assess the risks of streamflow contamination because of the rapid renewal cycle of river water in this flat and intensively cultivated landscape.

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Water resources in inland regions of central Asia: Evidence from stable isotope tracing

Cited by 68 publications

References 41 publications

Water Stable Isotopes in an Alpine Setting of the Northeastern Tibetan Plateau

Water Stable Isotopes in an Alpine Setting of the Northeastern Tibetan Plateau

Features of Oxygen and Hydrogen Isotopes in Waters from the Karst Mountains, Xiangxi River Basin

Stable isotopes of surface water and groundwater in a typical subtropical basin in south‐central China: Insights into the young water fraction and its seasonal origin

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