APPLICATION OF ASTER DEM IMAGE TO ESTABLISHING GEOMORPHOLOGICAL MAPS OF MOUNTAINOUS AREAS IN QUANG NAM PROVINCE

Abstract

Geomorphological maps have great significance for the scientific realization of a territory. It is the input data to study phenomena such as landslides and flash floods. Mountainous areas in Quang Nam province have the complex terrain:  high slopes and altitudes, the intense level of cross-sectional and deep cleavage strength. The application of remote sensing images ASTER DEM to the construction of thematic maps of geomorphology brings high efficiency, save time and cost... As a result, we have built the thematic maps of monitoring forms of geomorphology which are: DEM maps, slope maps, slope maps, and deep cleavage maps. This is an important data base to study natural disasters in the mountainous areas in Quang Nam province such as flooding, erosion, landslides in the area, road construction and irrigation works.