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

在我国，自然灾害是造成灾害的主要原因。例如，大雨和地震。每年都有地方发生滑坡、泥石流和雪崩。许多人在这些灾难中丧生。为了防止山区的这些灾害，熟练的工程师们凭借他们的直觉和经验实践了侵蚀控制计划。本研究的目的是利用地理信息系统（GIS）和遥感技术，进行泥沙量估算、流域提取和Sabo大坝定位等模拟计算。(Sabo dam在英语中是指碎屑坝）接下来，我们建议使用GIS来估计参数。利用地理信息系统（GIS）技术，将水土流失防治规划图、环境评价图、遥感影像等数据进行叠加，建立了结合环境条件的模拟算法。研究还表明，GIS技术将有助于评估侵蚀控制和灾害管理。

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.