基于GIS的信息量法在青海民和区域地质灾害易发性评价中的应用

摘要

The regional susceptibility evaluation of geological hazards has a profound meaning for the local government effectively conduct the mass monitoring and preventing work of geological hazards.The article discusses the principle of GIS-based information method, and the application to geohazards risk assessment in Minhe County.The GIS-based information method brings the spatial analysis ability of GIS technology and the quantitative analysis of information method, the calculation of information value and the completion of the regional risk assessment are based on the statistical evaluation factors of geological hazards within the distribution layer.Through analyzing the susceptibility evaluation of geological hazards by employing GIS information, the high susceptibility zones, middle susceptibility zones and low susceptibility zones account 34.0%, 53.3%, and 12.7% of the total area of Minhe County, respectively.The evaluation results are reliable and basically, which is consistent with the actual situation.%地质灾害区域易发性评价对于当地政府有效开展地质灾害群测群防工作具有深刻意义.论述了基于GIS的信息量法原理及其在民和县地质灾害区域易发性中的应用.综合使用GIS技术的空间分析功能和信息量法的定量评价功能,统计评价因子图层内地质灾害分布密度,实现信息值的计算,完成区域易发性评价.实验结果表明,县境内地质灾害高易发区占全县总面积的34.0%;地质灾害中易发区占全县总面积的53.3%;地质灾害低易发区占全县总面积的12.7%.评价结果基本与实际相符合,评价结果具有可靠性.