An isotope study of the Shule River Basin, Northwest China: Sources and groundwater residence time, sulfate sources and climate change

Xie, Chunyi; Zhao, Liang; Eastoe, Christopher J.; Wang, Ninglian; Dong, Xiying

doi:10.1016/j.jhydrol.2022.128043

Cited by 12 publications

(10 citation statements)

References 64 publications

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“…Tian et al (2007) pointed out that the Yushu area (34° N ~ 35° N) is the dividing line of the inland extent of the Indian summer monsoon; then Yao et al (2009) divided the Tibetan Plateau into three parts and defined the north of 35° N as westerlies domain. However, Xie et al (2022) captured the isotopic signal of Indian summer monsoon anomaly intruding the HSR based on monthly scale δ 18 O p , and pointed out that the HSR was affected by Indian summer monsoon in August 2018.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the East Asian summer monsoon originating from the Pacific Ocean and the Indian summer monsoon from the Bay of Bengal as well as the Arabian Sea tend to deplete stable isotopes of atmospheric vapour and precipitation (Tian et al, 2007;Yu et al, 2006). In general, it is difficult for the Indian summer monsoon to reach the HSR due to the blocking effect of the high topography in the Tibetan Plateau (Xie et al, 2022). Tian et al (2007)…”

Section: Evidence Of the Moisture Sources From The Isotopic Compositi...mentioning

confidence: 99%

“…The deuterium excess (d‐excess = δ 2 H − 8 × δ 18 O) quantifies the non‐equilibrium isotopic fractionation (Dansgaard, 1964) and serves as an effective tracer of moisture conditions in moisture source region. Based on the coverage of the global network of isotopes of precipitation (GNIP), numerous studies have identified various factors affecting the variation of precipitation δ 18 O (δ 18 O p ), such as moisture source sites (Shi et al, 2021), atmospheric transport processes (Zhang et al, 2004), latitude (Liu, Song, et al, 2008; Liu, Tian, et al, 2008; Valdivielso et al, 2022), altitude (Yao et al, 2009), and local meteorological elements (Guo et al, 2017; Xie et al, 2022; Zhao et al, 2023). In addition, d‐excess mainly depends on the meteorological conditions (e.g., relative humidity, sea surface temperature, wind speed) at the oceanic moisture source (Gat et al, 2003), and more studies in recent years have shown that local evaporation and changes in the hydrological cycle also have an impact on it (Parkes et al, 2017; Tian et al, 2020; Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Previous research has revealed that the northward progression of the monsoon zone is highly variable in both the interannual and interdecadal term, influenced by fluctuations in monsoon intensity (Tan & Gong, 2022). The Indian summer monsoon has been observed to surmount the highlands and extend to the central Tibetan Plateau (Dai et al, 2021; Li et al, 2023; Yu et al, 2021), with some years of heightened activity even reaching the northeast (Gui et al, 2020; Li et al, 2015; Xie et al, 2022; Zhao et al, 2023). This process is accompanied by strong convection, leading to a significant depletion of stable isotopic compositions of precipitation and atmospheric vapour.…”

Section: Introductionmentioning

confidence: 99%

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Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Zhang,

Zhao,

Wang

et al. 2024

Hydrological Processes

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Stable isotopic compositions of precipitation (δ18Op, δ2Hp and d‐excessp) and atmospheric vapour (δ18Ov, δ2Hv and d‐excessv) with high spatial–temporal resolution are crucial in revealing hydrologic cycle. Based on the variation characteristics of δ18Op/δ18Ov, δ2Hp/δ2Hv and d‐excessp/d‐excessv in the headwaters of the Shule River (HSR) on hourly and daily scales from June to September 2018, this study analysed the relationships between δ18Op/δ2Hp and δ18Ov/δ2Hv combined with the equilibrium fractionation model, as well as δ18Op/δ18Ov and meteorological factors. The slopes of local meteoric water line (LMWL) and the δ2Hv‐δ18Ov fitting equation were similar (7.96 and 7.94) with both intercepts exceeding 10, reflecting the great contribution of recycling moisture. The values of δ18Ov/δ2Hv were lower than δ18Op/δ2Hp but with consistent variation patterns throughout the period. The equilibrium simulation results suggested that precipitation and atmospheric vapour almost approached isotopic equilibrium state, especially during monsoon intrusion period. Affected by monsoon intrusion, the slopes and intercepts of the LMWLs and the δ2Hv‐δ18Ov fitting equations were smaller than those during non‐monsoon period and d‐excess and δ18O were negatively correlated. Relative humidity had significant negative correlations with δ18Op and δ18Ov in the whole period, however, the positive correlations between δ18Op/δ18Ov and temperature were observed during non‐monsoon and monsoon intrusion period, respectively. Our results demonstrated that precipitation and atmospheric vapour isotopic compositions exhibited consistency under the influence of diverse moisture sources, while more complex relationships were found between δ18Op/δ18Ov and meteorological factors. This research provided evidence for using the isotopic compositions of atmospheric vapour to indicate moisture sources, and can improve understanding of the water cycle and eco‐hydrological process from the perspective of the interaction between water and gas phases of the inland river basin in northwest China.

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Section: Discussionmentioning

confidence: 99%

Section: Evidence Of the Moisture Sources From The Isotopic Compositi...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Zhang,

Zhao,

Wang

et al. 2024

Hydrological Processes

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“…The research area is bounded between 95.42-98.06 E longitude, and 39.81-40.65 N latitude (Figure 2c). Located in the hinterland of Eurasia, the Shule River Basin is one of the most arid areas in China (Xie et al, 2022). According to Köppen's climate classification, Bwk, a cold desert climate, predominates the research area (Beck et al, 2018).…”

Section: Location Of the Study Areamentioning

confidence: 99%

Soil salinity estimation in Shule River Basin using support vector regression model

2023

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Soil salinization is a progressive degradation process that spreads globally and leads to a decline in soil fertility. Assessing the scale of salinization is crucial for sustainable agricultural development and saline‐land rehabilitation. In this study, we proposed a support vector regression spatial (SVR‐S) model that utilizes spatial dependence information to predict soil salinity over the irrigation area of the Shule River Basin in northwestern China. To investigate the performance of the SVR‐S model, 50 soil samples were collected in the field. Semivariograms of soil salinity (measured as total salt content and ion concentrations) were constructed to measure spatial dependence. The SVR‐S model was compared with the original SVR model and the geographically weighted regression (GWR) model regarding the salinity prediction ability. The soil salinity in the experimental area demonstrated a strong spatial dependence pattern. The SVR‐S model delivered a better performance than the SVR‐O and GWR. SVR‐S showed a correlation coefficient R of 0.87 and a root mean square error (RMSE) of 1.83%, while the performance of SVR‐O (R = 0.75, RMSE = 3.32%) and GWR (R = 0.73, RMSE = 3.47%) was comparatively poor. Topographic indices integrating spatial information contributed the most to the estimation of salinity in the study area. This study provides a new approach to integrating spatial information for accurate soil salinity mapping.

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Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau

Xie,

Liu,

et al. 2024

Journal of Environmental Management

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An isotope study of the Shule River Basin, Northwest China: Sources and groundwater residence time, sulfate sources and climate change

Cited by 12 publications

References 64 publications

Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Stable isotopic compositions and controlling factors of precipitation and atmospheric vapour in the headwaters of the Shule River

Soil salinity estimation in Shule River Basin using support vector regression model

Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau

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