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Theme 2: GIT applications in
geohazards (finished end of 2008)
Theme Manager: Bernd Etzelmüller (UiO)
Geographical information
technology in geohazards
The theme integrates and
co-ordinates GIT related activities within the ICG, with a special focus
on the integration and application of digital elevation models (DEM) and
remote sensing activities (RS).
Overview and introduction
Geographical Information
Technology (GIT) comprises tools for capturing, storing, analysing and
presenting spatial data sets. A Geographical information system
developed for defined purposes can handle large data sets, which makes
it possible to analyse and visualise even complex spatial relationships.
GIS applications have therefore been identified to be an important tool
for geohazard studies. GIS applications can contribute on various levels
within such studies. Common for all levels is the need for knowledge of:
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Previous locations of
failures and earthquake epicentres (e.g. existing landforms developed
after a failure)
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Factors affecting failure
conditions (e.g. geological structures, faults, moisture distribution,
thermal conditions, topography)
-
Areas potentially in risk
for being threatened by geohazards including their "value"
(economical, human live threat etc)
GIS applications can either
be used to effectively visualise the information or to contribute
actively in identification of geo-hazard risk zones and vulnerability
analyses. In order to develop a spatial risk model, we first need to
know the spatial distribution of the process and factors/mechanics
leading to a slope failure.
Figure
2.
Landslide risk zonation for Central Asia (Nadim et al., 2006).
Within the ICG theme “GIS
application and geohazard” we will focus on the field of digital terrain
analyses and -classification to achieve a better understanding of
spatial distribution patterns of geo-hazards/landslides, and forms the
bases for regionalisation procedures of landslide processes. A sub-task
here is the physical-based modelling of potential landslide travelling
routes based on digital elevation models. As a second focus we will
contribute to the GIS-based prediction modelling of geo-hazards, usable
for risk assessment and vulnerability analyses. Some major aims are
formulated as:
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Develop methodologies for
slope hazard regionalisation based on digital terrain analyses
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Develop scientific sound
and justified weighting factor for GIS-based hazard prediction
modelling
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Develop GIS-based
prediction models for slope hazard and vulnerability analyses
Themes
Read more!
Recent results
- Rock slide
risk in water magazines (in co-operation with ICG project XX and NVE)
Global and
regional landslide “hotspots” (in co-operation with ICG project XX)
- Landform classification and contextual merging
- High resolution DEMs
for rockslide hazard assessment
- Landslide database for Nicaragua (in cooperation with
ICG project 9 and INETER)
- Statistical analysis of Nicaraguan landslides (in cooperation with
ICG
project 9)
Read more!
Personnel
UiO:
Bernd Etzelmüller (Theme leader)
, Andreas Kääb
, Bård Romstad (PhD, UiO)
NTNU:
Terje Midtbø (NTNU)
, Trond Nordvik (PhD, NTNU)
NGI:
Ulrik Domaas(Theme leader Slide modelling)
, Farrokh Nadim
, Graziella
Devoli (PhD)
NGU:
Marc-Henri Derron
, John Dehls
NORSAR:
PhD students involved in all or parts of the theme
Bård Romsdal (UiO)
Trond Nordvik (NTNU)
Graziella Devoli (UiO)
Master students involved in all or parts of the theme
Morten
Ramberg
(UiO, FFI)
– PS INSAR
Morten
Berg (UiO)
– Slide path modelling
International co-operations:
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Departments of Geogaphy, University of Bonn, Germany
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Department of Geography, University of Zurich, Switzerland
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AFFILIATION,
University of Mexico, USA
- International working group on "Glacier and permafrost hazards in
mountains" by the International Commission on Cryospheric Sciences (ICSI)
and the International Permafrost Association (IPA)
- Global Land Ice Measurements from Space (GLIMS) project
CNR-IRPI, Torino
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ITC, Enchede, Netherlands
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Instituto Nicaraguense de Estudios
Territoriales (INETER), Managua, Nicaragua
Education
The
ICG theme is actively involved in the master programme “Geosciences”,
and the specialisation “Environmental geology and geohazards” at the
Department of Geosciences, University of Oslo. We offer a 10 ETS course
GEO4510 with the title “Terrain analyses and remote sensing on geohazard
assessment”.
Bibliography
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