During flood events Earth Observation (EO) Synthetic Aperture Radar (SAR) is able to provide valuable information on the spatial extent of inundations. With its multi-polarisation capacity, the ENVISAT ASAR instrument is now able to propose reliable data for maximum flood extent retrieval. These extents can be useful in calibrating and/or evaluating flood propagation models and their uncertainties. Models are currently calibrated with in situ measurements such as high water marks, photographs and flow velocities. Since these are point measurements, it may sometimes be difficult to relate this information to a highly spatially dependent phenomenon: flooding. It is shown that flood propagation model calibration and uncertainties evaluation can greatly benefit from EO derived information.
|Number of pages
|European Space Agency, (Special Publication) ESA SP
|Published - 29 Aug 2005