Exploration of Flood Zones and Physiographic and Quantitative Features of Daman Catchment Area by the Use of Geographic Information and Remote Sensing

Daman catchment area with an area of 3437 km2 is located in the south east part of Iran in Sistan & Baluchestan province. In this study, in order to determine and specify the specifications of Daman catchment area such as number of sub- catchment areas and their type, area circumference, shape, slope and focus time, while benefiting from a new method, by using GIS analytical functions and digit elevation modle (DEM) has been compared with traditional methods. ETM sensing images with having band information in the range of visible wave length separates the areas subject to flooding for having weak vegetation cover and also new sediments in river terraces. In this study, different band combinations from land sat ETM+ images for Daman catchment area and river was prepared. For this purpose, different hybrid methods (uncontrolled and visual) were studied. The results of the research indicate this fact that using satellite images is so useful for the areas with insufficient information and statistios about flood phenomenon, and by interpreting the images with high resolution, it is possible to identify and classify the vulnerable zone from flood.