【摘要】 基于遥感(RS)和地理信息系统(G IS)技术,采用多层次分析(AHP)法,以四川宣汉天台乡为研究区,根据该区实际情况,选取线性构造、道路、土地利用、坡度、坡向5种影响滑坡灾害发生的因素作为评价因子,进行区域滑坡危险性评估。在ArcG IS的空间分析环境中运行权重叠加,把研究区划分成滑坡极易发生区、易发生区、一般发生区、可能发生区、难发生区和极难发生区。通过实地调查和与研究区的滑坡灾害实证研究结果进行比较,发现评估结果与实际状况较为吻合,研究方法能够准确地评估区域滑坡灾害危险性的程度。更多还原

【Abstract】 Based on RS(remote sensing) and GIS (geographic information system),landslide hazard assessment of Tiantai in Xuanhan County,Sichuan is studied by AHP(analytic hierarchy process) method.Five(evaluation)(elements) including lineament structure, road,land use,slope grade and slope aspect are selected for landslide hazard assessment.The study area is divided into six regions by weight overlay as follows,landslide extremely easily happening,landslide very easily happening,landslide easily happening,landslide possibly happening,landslide difficultly happening and landslide hardly ever happening.Compared with field survey and related study results,it is found that the results coincide properly with the actual situation.The risk of regional landslide hazard can be assessed by the method provided in this paper.更多还原