Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas
Rock glaciers are slowly flowing mixtures of debris and ice occurring in mountains. They can represent a reservoir of water, and melting ice inside them can affect surface water hydrochemistry. Investigating the interactions between rock glaciers and water bodies is therefore necessary to better und...
Published in: | Earth Surface Processes and Landforms |
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2018
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Online Access: | http://hdl.handle.net/11585/625700 https://doi.org/10.1002/esp.4257 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1096-9837 |
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ftunibolognairis:oai:cris.unibo.it:11585/625700 2024-02-11T10:04:41+01:00 Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco 2018 ELETTRONICO http://hdl.handle.net/11585/625700 https://doi.org/10.1002/esp.4257 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1096-9837 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000424164000006 volume:43 issue:2 firstpage:417 lastpage:431 numberofpages:15 journal:EARTH SURFACE PROCESSES AND LANDFORMS http://hdl.handle.net/11585/625700 doi:10.1002/esp.4257 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85031321249 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1096-9837 Alp Heat tracer Permafrost Rock glacier Waterborne geophysic Geography Planning and Development Earth-Surface Processe Earth and Planetary Sciences (miscellaneous) info:eu-repo/semantics/article 2018 ftunibolognairis https://doi.org/10.1002/esp.4257 2024-01-24T17:50:28Z Rock glaciers are slowly flowing mixtures of debris and ice occurring in mountains. They can represent a reservoir of water, and melting ice inside them can affect surface water hydrochemistry. Investigating the interactions between rock glaciers and water bodies is therefore necessary to better understand these mechanisms. With this goal, we elucidate the hydrology and structural setting of a rock glacier-marginal pond system, providing new insights into the mechanisms linking active rock glaciers and impounded surface waters. This was achieved through the integration of waterborne geophysical techniques (ground penetrating radar, electrical resistivity tomography and self-potentials) and heat tracing. Results of these surveys showed that rock glacier advance has progressively filled the valley depression where the pond is located, creating a dam that could have modified the level of impounded water. A sub-surface hydrological window connecting the rock glacier to the pond was also detected, where an inflow of cold and mineralised underground waters from the rock glacier was observed. Here, greater water contribution from the rock glacier occurred following intense precipitation events during the ice-free season, with concomitant increasing electrical conductivity values. The outflowing dynamic of the pond is dominated by a sub-surface seepage where a minor fault zone in bedrock was found, characterised by altered and highly-fractured rocks. The applied approach is evaluated here as a suitable technique for investigating logistically-complex hydrological settings which could be possibly transferred to wider scales of investigation. Article in Journal/Newspaper Ice permafrost IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Earth Surface Processes and Landforms 43 2 417 431 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Alp Heat tracer Permafrost Rock glacier Waterborne geophysic Geography Planning and Development Earth-Surface Processe Earth and Planetary Sciences (miscellaneous) |
spellingShingle |
Alp Heat tracer Permafrost Rock glacier Waterborne geophysic Geography Planning and Development Earth-Surface Processe Earth and Planetary Sciences (miscellaneous) Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
topic_facet |
Alp Heat tracer Permafrost Rock glacier Waterborne geophysic Geography Planning and Development Earth-Surface Processe Earth and Planetary Sciences (miscellaneous) |
description |
Rock glaciers are slowly flowing mixtures of debris and ice occurring in mountains. They can represent a reservoir of water, and melting ice inside them can affect surface water hydrochemistry. Investigating the interactions between rock glaciers and water bodies is therefore necessary to better understand these mechanisms. With this goal, we elucidate the hydrology and structural setting of a rock glacier-marginal pond system, providing new insights into the mechanisms linking active rock glaciers and impounded surface waters. This was achieved through the integration of waterborne geophysical techniques (ground penetrating radar, electrical resistivity tomography and self-potentials) and heat tracing. Results of these surveys showed that rock glacier advance has progressively filled the valley depression where the pond is located, creating a dam that could have modified the level of impounded water. A sub-surface hydrological window connecting the rock glacier to the pond was also detected, where an inflow of cold and mineralised underground waters from the rock glacier was observed. Here, greater water contribution from the rock glacier occurred following intense precipitation events during the ice-free season, with concomitant increasing electrical conductivity values. The outflowing dynamic of the pond is dominated by a sub-surface seepage where a minor fault zone in bedrock was found, characterised by altered and highly-fractured rocks. The applied approach is evaluated here as a suitable technique for investigating logistically-complex hydrological settings which could be possibly transferred to wider scales of investigation. |
author2 |
Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco |
format |
Article in Journal/Newspaper |
author |
Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco |
author_facet |
Colombo, Nicola Sambuelli, Luigi Comina, Cesare Colombero, Chiara Giardino, Marco Gruber, Stephan Viviano, Gaetano Vittori Antisari, Livia Salerno, Franco |
author_sort |
Colombo, Nicola |
title |
Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
title_short |
Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
title_full |
Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
title_fullStr |
Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
title_full_unstemmed |
Mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
title_sort |
mechanisms linking active rock glaciers and impounded surface water formation in high-mountain areas |
publishDate |
2018 |
url |
http://hdl.handle.net/11585/625700 https://doi.org/10.1002/esp.4257 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1096-9837 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000424164000006 volume:43 issue:2 firstpage:417 lastpage:431 numberofpages:15 journal:EARTH SURFACE PROCESSES AND LANDFORMS http://hdl.handle.net/11585/625700 doi:10.1002/esp.4257 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85031321249 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1096-9837 |
op_doi |
https://doi.org/10.1002/esp.4257 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
43 |
container_issue |
2 |
container_start_page |
417 |
op_container_end_page |
431 |
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1790601404559130624 |