Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal
The Thulagi Glacier Lake in the Gorkha District of western Nepal was investigated by electrical resistivity tomography (ERT) to delineate buried glacier ice and permafrost zones within the dam. Data were processed using a 2-D inversion program and by finite-difference forward modelling. Interpretati...
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ftjnepaljo:oai:ojs.pkp.sfu.ca:article/32348 2024-09-30T14:36:21+00:00 Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal Pant, Surendra Raj Reynolds, John M. 2000-12-01 application/pdf https://nepjol.info/index.php/JNGS/article/view/32348 eng eng Nepal Geological Society https://nepjol.info/index.php/JNGS/article/view/32348/25565 https://nepjol.info/index.php/JNGS/article/view/32348 Copyright (c) 2000 Nepal Geological Society Journal of Nepal Geological Society; Vol. 22 (2000); 211–218 2676-1378 0259-1316 Electrical Resistivity Tomography Permafrost and glacier Natural dam Thulagi Glacier Lake Nepal info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2000 ftjnepaljo 2024-09-18T00:28:58Z The Thulagi Glacier Lake in the Gorkha District of western Nepal was investigated by electrical resistivity tomography (ERT) to delineate buried glacier ice and permafrost zones within the dam. Data were processed using a 2-D inversion program and by finite-difference forward modelling. Interpretation of the processed electrical images indicates that the method can be used for detecting the buried ice and permafrost by virtue of their very high electrical resistivity values (>20,000 Ohm.m and >5.000 Ohm.m, respectively). The resistivity of permafrost seems to be strongly dependent on the material particle size: the finer the particle size the lower is the value of electrical resistivity. Water-saturated glacier sediments have values of electrical resistivity less than 3,000 Ohm.m. The ERT method was useful in mapping of buried glacier ice and permafrost as well as in differentiating other geological materials constituting the dam. Article in Journal/Newspaper Ice permafrost Nepal Journals Online (NepJOL) |
institution |
Open Polar |
collection |
Nepal Journals Online (NepJOL) |
op_collection_id |
ftjnepaljo |
language |
English |
topic |
Electrical Resistivity Tomography Permafrost and glacier Natural dam Thulagi Glacier Lake Nepal |
spellingShingle |
Electrical Resistivity Tomography Permafrost and glacier Natural dam Thulagi Glacier Lake Nepal Pant, Surendra Raj Reynolds, John M. Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
topic_facet |
Electrical Resistivity Tomography Permafrost and glacier Natural dam Thulagi Glacier Lake Nepal |
description |
The Thulagi Glacier Lake in the Gorkha District of western Nepal was investigated by electrical resistivity tomography (ERT) to delineate buried glacier ice and permafrost zones within the dam. Data were processed using a 2-D inversion program and by finite-difference forward modelling. Interpretation of the processed electrical images indicates that the method can be used for detecting the buried ice and permafrost by virtue of their very high electrical resistivity values (>20,000 Ohm.m and >5.000 Ohm.m, respectively). The resistivity of permafrost seems to be strongly dependent on the material particle size: the finer the particle size the lower is the value of electrical resistivity. Water-saturated glacier sediments have values of electrical resistivity less than 3,000 Ohm.m. The ERT method was useful in mapping of buried glacier ice and permafrost as well as in differentiating other geological materials constituting the dam. |
format |
Article in Journal/Newspaper |
author |
Pant, Surendra Raj Reynolds, John M. |
author_facet |
Pant, Surendra Raj Reynolds, John M. |
author_sort |
Pant, Surendra Raj |
title |
Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
title_short |
Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
title_full |
Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
title_fullStr |
Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
title_full_unstemmed |
Application of electrical imaging techniques for the investigation of natural dams: an example from the Thulagi Glacier Lake, Nepal |
title_sort |
application of electrical imaging techniques for the investigation of natural dams: an example from the thulagi glacier lake, nepal |
publisher |
Nepal Geological Society |
publishDate |
2000 |
url |
https://nepjol.info/index.php/JNGS/article/view/32348 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Journal of Nepal Geological Society; Vol. 22 (2000); 211–218 2676-1378 0259-1316 |
op_relation |
https://nepjol.info/index.php/JNGS/article/view/32348/25565 https://nepjol.info/index.php/JNGS/article/view/32348 |
op_rights |
Copyright (c) 2000 Nepal Geological Society |
_version_ |
1811639434611785728 |