基于ArcGIS的陕西山洪灾害易发程度区划

Susceptible Degree Zoning of Mountain Torrent Disasters in Shaanxi Based on ArcGIS

以ArcG IS为工作平台,利用1∶25万数字地形地质图,以小流域为单元,对陕西全省山洪灾害,包括溪河洪水、滑坡和泥石流灾害在陕北风沙高原和黄土高原与陕南秦巴山地二个一级区划的基础上进行灾害易发程度二级区划,分为高易发、中易发和低易发三种级别18个区。

Based on the ArcGIS and 1 ： 250000 digital geological maps, the second level zoning of susceptible degree of mountain torrent disasters of whole Shaanxi is carried out based on the first level zoning of disaster susceptible degree in desert and loess plateau in northern Shaanxi and Qinling-Bashan mountainous region in southern Shaanxi. The hazards include river or small stream flood, landslide and debris-flow. It is divided into 18 zones according to 3 degrees, i. e. , zones of high, moderate and low susceptible degrees.