Digital elevation models (DEMs) are needed for mapping and modelling natural hazards and risks that are influenced by topography, for example floods and landslides. Satellite data provide elevation information.
The Agustin Codazzi Geographic Institute (IGAC), host of UN-SPIDER's Regional Support Office in Colombia, conducted a case study to identify flooded areas in Colombia during the maximum rainfall period of the years 2010-2012.
Supplier of innovative small and medium-sized satellite systems SunSpace says its Sumbandila satellite has paved the way for further research and development into the requirements of a future, locally built, communications satellite over which the South African National Defence Force (SANDF) could have total control.
Current regional and global scale hydrological models, such as the Coupled Routing and Excess STorage (CREST) model, do not take into account the release and storage of water by man-made dams. These models make gross assumptions about dam operation, impairing their accuracy and utility. In many less economically developed areas of the world, it is not possible to acquire information on the timing and extent of water release in dammed regions.