Spatio-temporal variation of stable isotopes of river waters, water source identification and water security in the Heishui Valley (China) during the dry-season

Liu, Yuhong; An, Shuqing; Xu, Zhen; Fan, Ningjiang; Cui, Jun; Wang, Zhongsheng; Liu, Shirong; Pan, Jiayong; Lin, Guanghui

doi:10.1007/s10040-007-0260-3

Cited by 22 publications

(24 citation statements)

References 38 publications

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“…LMWL was dD = 9.3d 18 O + 25.9 and cited from previous report (Liu et al, 2008). Ground water values during the dry season were cited from previous report (Liu et al, 2008), too.…”

Section: Discussionmentioning

confidence: 97%

“…Since the local climatic factors affected the LMWL, comparing the different water samples with the LMWL was useful to test water source and isotopic fractionation for regional hydrology investigation (Clark and Fritz, 1997). LMWL was dD = 9.3d 18 O + 25.9 and cited from previous report (Liu et al, 2008). Ground water values during the dry season were cited from previous report (Liu et al, 2008), too.…”

Section: Discussionmentioning

confidence: 99%

“…The value of river water during the wet season was used as the total, the average values of rain in each sub-watershed served as the event water, while the values of water samples collected from glacial and snow meltwater during the dry season was used as the pre-event water and cited from previous studies (Liu et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…DC was the decrease rate of À0.2 ± 0.04& in d 18 O or À1.9 ± 0.2& in dD with each 100 m in altitude (Liu et al, 2008). The mean annual precipitation (P) distribution for seven watersheds was obtained from the spatial distribution of mean annual precipitation in the Minjiang valley (Jiang et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…According to the records of the Heishui precipitation station (32°03.00 0 N, 102°35.4 0 E; altitude of 2400 m above sea level (asl)), the average annual temperature is 9°C and the average annual rain is 833 mm (Liu et al, 2008). The climate is described as a monsoon climate, affected by two atmospheric circulations.…”

Section: Study Areasmentioning

confidence: 99%

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Characteristics of water isotopes and hydrograph separation during the wet season in the Heishui River, China

Liu

Fan

et al. 2008

Journal of Hydrology

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“…LMWL was dD = 9.3d 18 O + 25.9 and cited from previous report (Liu et al, 2008). Ground water values during the dry season were cited from previous report (Liu et al, 2008), too.…”

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Study Areasmentioning

confidence: 99%

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Characteristics of water isotopes and hydrograph separation during the wet season in the Heishui River, China

Liu

Fan

et al. 2008

Journal of Hydrology

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Sub-surface water contribution to recession flow in a mountain headwater stream system based on single monitoring campaign

et al. 2015

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Discharge in mountain streams may be a mixture of snowmelt, water from surface runoff, and deep return flow through valley bottom alluvia. We used δ 18 O and δ 2 H, solute concentrations, and 222 Rn to determine water sources of a headwater stream located at the McDonald Creek watershed, Glacier National Park, USA, during summer recession flow period. We analysed minimal water isotope ranges of À17.6‰ to À16.5‰ and À133‰ to À121‰ for δ 18 O and δ 2 H, respectively, potentially due to dominance of snow-derived water in the stream. Likewise, solute concentrations measured in the stream through the watershed showed minimal variation with little indication of subsurface water input into the stream. However, we observed 222 Rn activities in the stream that ranged from 39 to 2646 Bq/m 3 with the highest value measured in middle of the watershed associated with channel constriction corresponding to changes in local orientation of underlying rocks. Downstream from this point, 222 Rn activity decreased from 581 to 117 Bq/m 3 in a series of punctuated steps associated with small rapids and waterfalls that we hypothesized to cause radon degassing with a maximum predicted loss of 427 Bq/m 3 along a 400 m distance. Based on mass balance calculations using 222 Rn activity values, streamflow, and channel characteristics, we estimated that groundwater contributed between 0.3% and 29% of total flow. Overall, we estimated a 5.9% of groundwater contribution integrated for stream reach measured at McDonald Creek during recession flow period. Finally, a lower mean hyporheic flux of 14 m 3 /day was estimated compared to the groundwater flux of 70 710 m 3 /day. These assessments highlight the potential for radon as a conservative tracer that can be used to estimate subsurface water contribution in mountain streams within a complex geologic setting. Figure 1. Map of the McDonald Creek watershed with the relative location within North America including dominant streams, lakes, waterfalls, and water sampling locations. The topographic slope is shown using the grey scale 900 R. P. NEUPANE ET AL. Rn activity and (b) temperature 908 R. P. NEUPANE ET AL.

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Spatial and temporal patterns of stable water isotopes along the Yangtze River during two drought years

Song

et al. 2017

Hydrological Processes

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Changes in the level of the Yangtze River caused by anthropogenic water regulation have major effects on the hydrological processes and water cycle in surrounding lakes and rivers. In this study, we obtained isotopic evidence of changes in the water cycle of Yangtze River during the two drought years of 2006 and 2013. Isotopic evidence demonstrated that the δ18O and δD levels in Yangtze River exhibited high spatial heterogeneity from the upper to lower reaches, which were controlled by atmospheric precipitation, tributary/lake water mixing, damming regulation, and water temperature. Both the slope and intercept of Yangtze River evaporative line (δD = 7.88 δ18O + 7.96) were slightly higher than those of local meteoric water line of Yangtze River catchment (δD = 7.41 δ18O + 6.01). Most of the river isotopic values were located below the local meteoric water line, thereby implying that the Yangtze River water experienced a certain degree of evaporative enrichment on isotopic compositions of river water. The high fluctuations in the isotopic composition (e.g., deuterium excess [d‐excess]) in the middle to lower reaches during the initial stage of operation for the Three Gorges Dams (2003–2006) were due to heterogeneous isotopic signatures from the upstream water. In contrast to the normal stage (after 2010) characterized by the maximum water level and largest water storage, a relatively small variability in the deuterium excess was found along the middle to lower reaches because of the homogenization of reservoir water with a longer residence time and complete mixing. The effects of water from lakes and tributaries on the isotopic compositions in mainstream water were highlighted because of the high contributions of lakes water (e.g., Dongting Lake and Poyang Lake) efflux to the Yangtze River mainstream, which ranged from 21% to 85% during 2006 and 2013. These findings suggest that the retention and regulation of the Three Gorges Dams has greatly buffered the isotopic variability of the water cycle in the Yangtze catchment, thereby improving our understanding of the complex lake–river interactions along the middle to lower reaches in the future.

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Spatio-temporal variation of stable isotopes of river waters, water source identification and water security in the Heishui Valley (China) during the dry-season

Cited by 22 publications

References 38 publications

Characteristics of water isotopes and hydrograph separation during the wet season in the Heishui River, China

Characteristics of water isotopes and hydrograph separation during the wet season in the Heishui River, China

Sub-surface water contribution to recession flow in a mountain headwater stream system based on single monitoring campaign

Spatial and temporal patterns of stable water isotopes along the Yangtze River during two drought years

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