objectives
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objectives
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The emphasis of the suggested project is the development of observation
methods that allow For spatial optimisation of the alert systems a multi scale approach will be applied, which will help to reduce the areas that have to be observed step by step. On a regional scale the areas of active and potential landslides
will be determined by an integration of remote sensing data (satellite
data, aerial photographs), geological and topographic maps and data of
historical landslides. In those areas a coarse observation network
(mainly GPS) will be installed in order to localize active zones more
precisely. The observation network will be optimised in additional refinement
steps. This may be performed by the application of methods like high precision
remote sensing and interferometric SAR (data of e.g. ERS-2, ENVISAT, IKONOS)
as well as continuous survey by robotic systems and high precision hydrostatic
levelling systems. The spatial optimisation of alert systems is highly
related with the choice of observation methods. Besides the positioning
of measuring devices additional aspects have to be taken into account
in order to be able to install a reliable alert system for landslides.
The devices have to work as reliable as possible and there should only
be a minimal need of maintenance. Besides that an alert system has to
anticipate potential landslide events as early as possible. This means
that not only the actual deformation of the surface has to be observed
but also processes that may precede a landslide (e.g. heavy rain, increase
of local groundwater table, temperature changes in the soil etc.). Since
it is not possible to relate these processes with deterministic models
new analysis tools (knowledge based systems, fuzzy systems) will be applied
for this task. In addition the intensive and multidisciplinary cooperation
of specialists for measuring devices, geology and geotechnics is planned.
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OBJECTIVES
to detect potential
landslides