Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region
This study focused on the hydrological and runoff formation processes of river water in the source regions of the Yangtze river during different ablation episodes in 2016 and the ablation period from 2016 to 2018. The effects of altitude were greater for the river in the glacier permafrost area than...
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ftcopernicus:oai:publications.copernicus.org:hessd80764 2023-05-15T17:55:39+02:00 Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region Li, Zong-Jie Li, Zong-Xing Song, Ling-Ling Ma, Jin-Zhu 2019-10-22 application/pdf https://doi.org/10.5194/hess-2019-530 https://www.hydrol-earth-syst-sci-discuss.net/hess-2019-530/ eng eng doi:10.5194/hess-2019-530 https://www.hydrol-earth-syst-sci-discuss.net/hess-2019-530/ eISSN: 1607-7938 Text 2019 ftcopernicus https://doi.org/10.5194/hess-2019-530 2019-12-24T09:48:18Z This study focused on the hydrological and runoff formation processes of river water in the source regions of the Yangtze river during different ablation episodes in 2016 and the ablation period from 2016 to 2018. The effects of altitude were greater for the river in the glacier permafrost area than for the mainstream and the permafrost area during the total ablation period in 2016. There was a significant negative correlation (at the 0.01 level) between precipitation and δ 18 O, while a significant positive correlation was evident between precipitation and d-excess. More interestingly, significant negative correlations appeared between δ 18 O and temperature, relative humidity, and evaporation. A mixed segmentation model for end-members was used to determine the proportion of the contributions of different water sources to the target water body. The proportions of precipitation, supra-permafrost water, and glacier and snow meltwater for the mainstream were 41.70 %, 40.88 %, and 17.42 %, respectively. The proportions of precipitation, supra-permafrost water, and glacier and snow meltwater were 33.63 %, 42.21 %, and 24.16 % for the river in the glacier permafrost area and 20.79 %, 69.54 %, and 9.67 %, respectively, for that in the permafrost area. The supra-permafrost water was relatively stable during the different ablation periods, becoming the main source of runoff in the alpine region, except for precipitation, during the total ablation period. Text permafrost Copernicus Publications: E-Journals |
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Copernicus Publications: E-Journals |
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English |
description |
This study focused on the hydrological and runoff formation processes of river water in the source regions of the Yangtze river during different ablation episodes in 2016 and the ablation period from 2016 to 2018. The effects of altitude were greater for the river in the glacier permafrost area than for the mainstream and the permafrost area during the total ablation period in 2016. There was a significant negative correlation (at the 0.01 level) between precipitation and δ 18 O, while a significant positive correlation was evident between precipitation and d-excess. More interestingly, significant negative correlations appeared between δ 18 O and temperature, relative humidity, and evaporation. A mixed segmentation model for end-members was used to determine the proportion of the contributions of different water sources to the target water body. The proportions of precipitation, supra-permafrost water, and glacier and snow meltwater for the mainstream were 41.70 %, 40.88 %, and 17.42 %, respectively. The proportions of precipitation, supra-permafrost water, and glacier and snow meltwater were 33.63 %, 42.21 %, and 24.16 % for the river in the glacier permafrost area and 20.79 %, 69.54 %, and 9.67 %, respectively, for that in the permafrost area. The supra-permafrost water was relatively stable during the different ablation periods, becoming the main source of runoff in the alpine region, except for precipitation, during the total ablation period. |
format |
Text |
author |
Li, Zong-Jie Li, Zong-Xing Song, Ling-Ling Ma, Jin-Zhu |
spellingShingle |
Li, Zong-Jie Li, Zong-Xing Song, Ling-Ling Ma, Jin-Zhu Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
author_facet |
Li, Zong-Jie Li, Zong-Xing Song, Ling-Ling Ma, Jin-Zhu |
author_sort |
Li, Zong-Jie |
title |
Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
title_short |
Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
title_full |
Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
title_fullStr |
Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
title_full_unstemmed |
Hydrological and Runoff Formation Processes Based on Isotope Tracing During Ablation Period in the Third Polar Region |
title_sort |
hydrological and runoff formation processes based on isotope tracing during ablation period in the third polar region |
publishDate |
2019 |
url |
https://doi.org/10.5194/hess-2019-530 https://www.hydrol-earth-syst-sci-discuss.net/hess-2019-530/ |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
eISSN: 1607-7938 |
op_relation |
doi:10.5194/hess-2019-530 https://www.hydrol-earth-syst-sci-discuss.net/hess-2019-530/ |
op_doi |
https://doi.org/10.5194/hess-2019-530 |
_version_ |
1766163606367371264 |