Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia)
Abstract In Central Yakutia, frozen river banks are affected by a combination of thermal and mechanical erosion. Exceptional bank retreat of up to 40 m per year is observed. This results from ground thawing produced by heat transfer from the flow of water through the frozen ground, followed by mechan...
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crwiley:10.1002/esp.592 2024-09-30T14:38:15+00:00 Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) Costard, F. Dupeyrat, L. Gautier, E. Carey‐Gailhardis, E. 2003 http://dx.doi.org/10.1002/esp.592 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.592 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.592 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 28, issue 12, page 1349-1359 ISSN 0197-9337 1096-9837 journal-article 2003 crwiley https://doi.org/10.1002/esp.592 2024-09-05T05:10:19Z Abstract In Central Yakutia, frozen river banks are affected by a combination of thermal and mechanical erosion. Exceptional bank retreat of up to 40 m per year is observed. This results from ground thawing produced by heat transfer from the flow of water through the frozen ground, followed by mechanical transport of the thawed sediments. A one‐dimensional model is proposed to estimate the thermal erosion efficiency. A test of this model is a comparison of results obtained from experiments carried out in a cold room. A hydraulic channel allows measurements of the thaw front propagation, as well as the thermal erosion rate, in simulated ground ice that is subjected to warm water flow. Various laboratory simulations demonstrate the validity of the mathematical model for the range of laboratory conditions. A hierarchy of parameters (Reynolds number, water and ground ice temperatures) is proposed to explain the present efficiency of thermal erosion along the Siberian rivers. From the characteristics of the Lena River (geometry, temperature and discharge) during the flood season, the erosion of banks with different ice content predicted by the model is in agreement with field observations. Copyright © 2003 John Wiley & Sons, Ltd. Article in Journal/Newspaper lena river Yakutia Siberia Wiley Online Library Earth Surface Processes and Landforms 28 12 1349 1359 |
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Abstract In Central Yakutia, frozen river banks are affected by a combination of thermal and mechanical erosion. Exceptional bank retreat of up to 40 m per year is observed. This results from ground thawing produced by heat transfer from the flow of water through the frozen ground, followed by mechanical transport of the thawed sediments. A one‐dimensional model is proposed to estimate the thermal erosion efficiency. A test of this model is a comparison of results obtained from experiments carried out in a cold room. A hydraulic channel allows measurements of the thaw front propagation, as well as the thermal erosion rate, in simulated ground ice that is subjected to warm water flow. Various laboratory simulations demonstrate the validity of the mathematical model for the range of laboratory conditions. A hierarchy of parameters (Reynolds number, water and ground ice temperatures) is proposed to explain the present efficiency of thermal erosion along the Siberian rivers. From the characteristics of the Lena River (geometry, temperature and discharge) during the flood season, the erosion of banks with different ice content predicted by the model is in agreement with field observations. Copyright © 2003 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Costard, F. Dupeyrat, L. Gautier, E. Carey‐Gailhardis, E. |
spellingShingle |
Costard, F. Dupeyrat, L. Gautier, E. Carey‐Gailhardis, E. Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
author_facet |
Costard, F. Dupeyrat, L. Gautier, E. Carey‐Gailhardis, E. |
author_sort |
Costard, F. |
title |
Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
title_short |
Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
title_full |
Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
title_fullStr |
Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
title_full_unstemmed |
Fluvial thermal erosion investigations along a rapidly eroding river bank: application to the Lena River (central Siberia) |
title_sort |
fluvial thermal erosion investigations along a rapidly eroding river bank: application to the lena river (central siberia) |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/esp.592 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.592 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.592 |
genre |
lena river Yakutia Siberia |
genre_facet |
lena river Yakutia Siberia |
op_source |
Earth Surface Processes and Landforms volume 28, issue 12, page 1349-1359 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.592 |
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Earth Surface Processes and Landforms |
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28 |
container_issue |
12 |
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1349 |
op_container_end_page |
1359 |
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1811640952200101888 |