Based on the digital topographic map of 1/ 250000 scale, a primary assessment for flood risk in Hubei Province has been made by use of the strong function on space analysis and overlapping of GIS (Geographic Information System) platform. Firstly, through analysis and digitization, four raster coverages are obtained about the following factors that compose flood risk: precipitation, topography, water system (including rivers, lakes and reservoirs) and frequency of historical floods. Secondly, a map of assessment for flood risk in Hubei Province is made by overlapping these raster coverages of t...
