Evaluation of Geological Disaster by Using Satelite Imagery and Digital Map Data

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In our country natural force causes most of disasters. For example, it is heavy rain and an earthquake. Every year we have calamities of landslides, mud flow and snow-slides somewhere. A lot of lives were lost in those disasters. To prevent those disasters in mountainous areas skilled engineers have been practiced the plan of erosion control with their intuition and experience. Those plans need long time and much labor ; and besides, most of them ignore the environmental assessments.Purpose of the study is easily simulates such as estimating the mass of earth and sand, extracting the watershed and locating the Sabo dam by using Geographic Information System (GIS) and Remote Sensing. (Sabo dam means debris dam in English) Next we proposed to use GIS for estimating parameters. A major purpose to use GIS technique is to be overlay the data like plan of erosion control , map of environmental assessment and Remote Sensing imageries.As a results we established the simulation algorithm to decide the location of Sabo dam considered with environment conditions. The research also described that GIS technology will useful to evaluate the erosion control and disaster management.