Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas
ABSTRACT Thermal and hydrological dynamics and their impacts on the stability of a moraine dam were analyzed and simulated for the Longbasaba Lake in the Himalaya, based on soil temperature, moisture and heat flux data observed at different depths in the dam from 2012 to 2016. Annual average heat in...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2018.38 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000382 |
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crcambridgeupr:10.1017/jog.2018.38 2024-06-16T07:40:39+00:00 Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas WANG, XIN YANG, CHENGDE ZHANG, YANLIN CHAI, KAILGUO LIU, SHIYIN DING, YONGJIAN WEI, JUNFENG ZHANG, YONG HAN, YONGSHUN 2018 http://dx.doi.org/10.1017/jog.2018.38 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000382 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 64, issue 245, page 407-416 ISSN 0022-1430 1727-5652 journal-article 2018 crcambridgeupr https://doi.org/10.1017/jog.2018.38 2024-05-22T12:54:03Z ABSTRACT Thermal and hydrological dynamics and their impacts on the stability of a moraine dam were analyzed and simulated for the Longbasaba Lake in the Himalaya, based on soil temperature, moisture and heat flux data observed at different depths in the dam from 2012 to 2016. Annual average heat income is greater than heat expenditure on the dam surface. The mean annual temperature at observed the depths of 0–150 cm is >0°C, although the average annual air temperature was −3.6°C over the dam, indicating a relatively larger temperature difference between moraine dam and air. The volumetric soil moisture content is relatively low with an annual average of 5%, peaking after the snow cover melting and active layer thawing. Simulation results indicate that the average yearly maximum thawing depth has been ~0.3 m deeper than the average yearly maximum freezing depth during the observation period. In the past 55 years, the yearly maximum thawing depth has increased, while yearly maximum freezing depth has decreased, implying that the permafrost in the dam has been deteriorating. The annual surplus heat and increasing permafrost thawing depth will result in further deterioration of permafrost and melting of buried ice in the dam, thereby decreasing its stability. Article in Journal/Newspaper Ice Journal of Glaciology permafrost Cambridge University Press Journal of Glaciology 64 245 407 416 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
ABSTRACT Thermal and hydrological dynamics and their impacts on the stability of a moraine dam were analyzed and simulated for the Longbasaba Lake in the Himalaya, based on soil temperature, moisture and heat flux data observed at different depths in the dam from 2012 to 2016. Annual average heat income is greater than heat expenditure on the dam surface. The mean annual temperature at observed the depths of 0–150 cm is >0°C, although the average annual air temperature was −3.6°C over the dam, indicating a relatively larger temperature difference between moraine dam and air. The volumetric soil moisture content is relatively low with an annual average of 5%, peaking after the snow cover melting and active layer thawing. Simulation results indicate that the average yearly maximum thawing depth has been ~0.3 m deeper than the average yearly maximum freezing depth during the observation period. In the past 55 years, the yearly maximum thawing depth has increased, while yearly maximum freezing depth has decreased, implying that the permafrost in the dam has been deteriorating. The annual surplus heat and increasing permafrost thawing depth will result in further deterioration of permafrost and melting of buried ice in the dam, thereby decreasing its stability. |
format |
Article in Journal/Newspaper |
author |
WANG, XIN YANG, CHENGDE ZHANG, YANLIN CHAI, KAILGUO LIU, SHIYIN DING, YONGJIAN WEI, JUNFENG ZHANG, YONG HAN, YONGSHUN |
spellingShingle |
WANG, XIN YANG, CHENGDE ZHANG, YANLIN CHAI, KAILGUO LIU, SHIYIN DING, YONGJIAN WEI, JUNFENG ZHANG, YONG HAN, YONGSHUN Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
author_facet |
WANG, XIN YANG, CHENGDE ZHANG, YANLIN CHAI, KAILGUO LIU, SHIYIN DING, YONGJIAN WEI, JUNFENG ZHANG, YONG HAN, YONGSHUN |
author_sort |
WANG, XIN |
title |
Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
title_short |
Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
title_full |
Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
title_fullStr |
Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
title_full_unstemmed |
Monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the Himalayas |
title_sort |
monitoring and simulation of hydrothermal conditions indicating the deteriorating stability of a perennially frozen moraine dam in the himalayas |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/jog.2018.38 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000382 |
genre |
Ice Journal of Glaciology permafrost |
genre_facet |
Ice Journal of Glaciology permafrost |
op_source |
Journal of Glaciology volume 64, issue 245, page 407-416 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2018.38 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
245 |
container_start_page |
407 |
op_container_end_page |
416 |
_version_ |
1802007615635456000 |