Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information
Alpine permafrost is prone to decrease in a warmer climate as a consequence of climate change which in turn may affect the runoff regime of high alpine catchments. In the presented case study detailed geophysical field investigations were performed in a 5 km2 large catchment in Western Austria to ga...
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ftunivnapoliiris:oai:www.iris.unina.it:11588/596014 2024-06-23T07:56:02+00:00 Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information Rogger M. Hausmann H. Krainer K. Brückl E. Blöschl G. CHIRICO, GIOVANNI BATTISTA EGU Rogger, M. Chirico, GIOVANNI BATTISTA Hausmann, H. Krainer, K. Brückl, E. Blöschl, G. 2013 http://hdl.handle.net/11588/596014 eng eng ispartofbook:Geophysical Research Abstracts EGU General Assembly 2013 volume:15 issue:EGU2013-3044 http://hdl.handle.net/11588/596014 climate change permafrost flooding info:eu-repo/semantics/conferenceObject 2013 ftunivnapoliiris 2024-06-10T14:58:49Z Alpine permafrost is prone to decrease in a warmer climate as a consequence of climate change which in turn may affect the runoff regime of high alpine catchments. In the presented case study detailed geophysical field investigations were performed in a 5 km2 large catchment in Western Austria to gain information about subsurface properties and permafrost occurrence. Ground penetrating radar, seismic refraction and ground-surface-temperature measurements were applied to map the spatial permafrost distribution, depths to the permafrost table and bedrock interface. This information was used to infer subsurface flow paths concepts for different geologic formations in the presence and absence of permafrost. The concepts were then used to set up a rainfall-runoff model and simulate the runoff response of the catchment for scenarios with and without permafrost. The results of the study show that geophysical information helps to improve the understanding of subsurface processes and to reduce the parameter identifiability problem. Subsurface model parameters are well constrained by the available field information and require little calibration. Furthermore, the simulations indicate that the melting of permafrost increases the available catchment storage which causes a reduction of flood peaks and an increase of runoff during recession. A reduction of extreme events is important since it may also affect flood events in downstream catchments. Conference Object permafrost IRIS Università degli Studi di Napoli Federico II |
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Open Polar |
collection |
IRIS Università degli Studi di Napoli Federico II |
op_collection_id |
ftunivnapoliiris |
language |
English |
topic |
climate change permafrost flooding |
spellingShingle |
climate change permafrost flooding Rogger M. Hausmann H. Krainer K. Brückl E. Blöschl G. CHIRICO, GIOVANNI BATTISTA Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
topic_facet |
climate change permafrost flooding |
description |
Alpine permafrost is prone to decrease in a warmer climate as a consequence of climate change which in turn may affect the runoff regime of high alpine catchments. In the presented case study detailed geophysical field investigations were performed in a 5 km2 large catchment in Western Austria to gain information about subsurface properties and permafrost occurrence. Ground penetrating radar, seismic refraction and ground-surface-temperature measurements were applied to map the spatial permafrost distribution, depths to the permafrost table and bedrock interface. This information was used to infer subsurface flow paths concepts for different geologic formations in the presence and absence of permafrost. The concepts were then used to set up a rainfall-runoff model and simulate the runoff response of the catchment for scenarios with and without permafrost. The results of the study show that geophysical information helps to improve the understanding of subsurface processes and to reduce the parameter identifiability problem. Subsurface model parameters are well constrained by the available field information and require little calibration. Furthermore, the simulations indicate that the melting of permafrost increases the available catchment storage which causes a reduction of flood peaks and an increase of runoff during recession. A reduction of extreme events is important since it may also affect flood events in downstream catchments. |
author2 |
EGU Rogger, M. Chirico, GIOVANNI BATTISTA Hausmann, H. Krainer, K. Brückl, E. Blöschl, G. |
format |
Conference Object |
author |
Rogger M. Hausmann H. Krainer K. Brückl E. Blöschl G. CHIRICO, GIOVANNI BATTISTA |
author_facet |
Rogger M. Hausmann H. Krainer K. Brückl E. Blöschl G. CHIRICO, GIOVANNI BATTISTA |
author_sort |
Rogger M. |
title |
Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
title_short |
Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
title_full |
Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
title_fullStr |
Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
title_full_unstemmed |
Distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
title_sort |
distributed hydrological modelling in a permafrost catchment - on the value of geophysical information |
publishDate |
2013 |
url |
http://hdl.handle.net/11588/596014 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
ispartofbook:Geophysical Research Abstracts EGU General Assembly 2013 volume:15 issue:EGU2013-3044 http://hdl.handle.net/11588/596014 |
_version_ |
1802648873779331072 |