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14 results on '"Shen, Sichen"'

6. Using tritium and 222Rn to estimate groundwater discharge and thawing permafrost contributing to surface water in permafrost regions on Qinghai-Tibet Plateau

Author

Peng Yi, John J. Gibson, Shen Sichen, Chengwei Wan, Zhongbo Yu, Kaifang Ji, and Kai Li

Subjects
Hydrology, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, 010403 inorganic & nuclear chemistry, Permafrost, 01 natural sciences, Pollution, 0104 chemical sciences, Analytical Chemistry, Nuclear Energy and Engineering, Streamflow, Environmental science, Radiology, Nuclear Medicine and imaging, Groundwater discharge, Meltwater, Surface runoff, Subsurface flow, Surface water, Spectroscopy, Groundwater
Abstract

On the Qinghai-Tibet Plateau, permafrost degradation and associated release of permafrost meltwater has undoubtedly modified the annual and seasonal streamflow patterns and influenced groundwater conditions. However, it is still unclear how extensively permafrost degradation has influenced surface and subsurface water systems due to very sparse observations. Isotope mass models combining tritium and 222Rn measurements are developed here to quantify the contributions of groundwater discharge and thawing permafrost to rivers and lakes in the Source Area of the Yellow River. Results demonstrate the spatial variability of permafrost thaw impacts and confirm significant influence on surface and subsurface runoff processes including effects on water yield capacity and water drainage connectivity. While results to date are conclusive, further work to refine the method and extend observations is warranted.

Published
2019

13. Using tritium and 222Rn to estimate groundwater discharge and thawing permafrost contributing to surface water in permafrost regions on Qinghai-Tibet Plateau.

Author

Wan, Chengwei, Li, Kai, Shen, Sichen, Gibson, J. J., Ji, Kaifang, Yi, Peng, and Yu, Zhongbo

Subjects
WATER, TRITIUM, PERMAFROST, GROUNDWATER, PLATEAUS
Abstract

On the Qinghai-Tibet Plateau, permafrost degradation and associated release of permafrost meltwater has undoubtedly modified the annual and seasonal streamflow patterns and influenced groundwater conditions. However, it is still unclear how extensively permafrost degradation has influenced surface and subsurface water systems due to very sparse observations. Isotope mass models combining tritium and 222Rn measurements are developed here to quantify the contributions of groundwater discharge and thawing permafrost to rivers and lakes in the Source Area of the Yellow River. Results demonstrate the spatial variability of permafrost thaw impacts and confirm significant influence on surface and subsurface runoff processes including effects on water yield capacity and water drainage connectivity. While results to date are conclusive, further work to refine the method and extend observations is warranted. [ABSTRACT FROM AUTHOR]

Published
2019
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