 |
| Titel |
First approaches towards modelling glacial hazards in the Mount Cook region of New Zealand's Southern Alps |
| VerfasserIn |
S. K. Allen, D. Schneider, I. F. Owens |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 2 ; Nr. 9, no. 2 (2009-03-31), S.481-499 |
| Datensatznummer |
250006716
|
| Publikation (Nr.) |
 copernicus.org/nhess-9-481-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Flood and mass movements originating from glacial environments are
particularly devastating in populated mountain regions of the world, but in
the remote Mount Cook region of New Zealand's Southern Alps minimal attention
has been given to these processes. Glacial environments are characterized by
high mass turnover and combined with changing climatic conditions, potential
problems and process interactions can evolve rapidly. Remote sensing based
terrain mapping, geographic information systems and flow path modelling are
integrated here to explore the extent of ice avalanche, debris flow and lake
flood hazard potential in the Mount Cook region. Numerous proglacial lakes
have formed during recent decades, but well vegetated, low gradient outlet
areas suggest catastrophic dam failure and flooding is unlikely. However,
potential impacts from incoming mass movements of ice, debris or rock could
lead to dam overtopping, particularly where lakes are forming directly
beneath steep slopes. Physically based numerical modeling with RAMMS was
introduced for local scale analyses of rock avalanche events, and was shown
to be a useful tool for establishing accurate flow path dynamics and
estimating potential event magnitudes. Potential debris flows originating
from steep moraine and talus slopes can reach road and built infrastructure
when worst-case runout distances are considered, while potential effects from
ice avalanches are limited to walking tracks and alpine huts located in close
proximity to initiation zones of steep ice. Further local scale studies of
these processes are required, leading towards a full hazard assessment, and
changing glacial conditions over coming decades will necessitate ongoing
monitoring and reassessment of initiation zones and potential impacts. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|