Application of the relief degree of land surface in landslide disasters susceptibility assessment in China

摘要: Chinese mountainous area takes 2/3 of its total land area, making it one the countries most seriously effected by landslide disasters, and impact on people's lives property becomes increasingly serious. Considering grim situation disasters resulting huge losses, is a very important work to assess susceptibility under national scale in order provide scientific basis for prevention. In many factors affecting appearance such as lithology, geological structure, earthquake zone distribution, etc, geomorphologic form main control spatial distribution China, also plays an role factor assessment susceptibility. The relief degree surface reference classification used describe reflect macroscopic characteristics topography large area. This paper extracts China based SRTM DEM covering whole country. Based extraction, classify into slow undulation, low moderate undulation alpine with range 0~25m, 25~75m, 75~200m, 200~600m >600m. It analyses correlation between different landscape patterns using information content model. results show that there good susceptibility, increase value surface, gradually increases.