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作 者:杨可明[1] 郭海会[1] 钱小丽[1] 王建超[2] 张丹丹[2]
机构地区:[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]中国国土资源航空物探遥感中心,北京100083
出 处:《地理与地理信息科学》2013年第3期104-108,F0003,共6页Geography and Geo-Information Science
基 金:国家自然科学基金项目(41271436);中央高校基本科研业务费专项资金项目(2009QD02)
摘 要:滑坡是一种常见的地质灾害,其危害性极大,科学地划分滑坡危险度是防灾减灾工作中主动预测预警的重要环节。该文结合GIS技术与信息熵理论,充分利用熵值法特别适合于确定同一个指标下不同因素相对权重的特点,开展了滑坡危险度区划模型中证据权法的改进研究,并以台湾地区为实验区,在综合考虑滑坡的形成要素并提取滑坡危险度评价因子后,实现了研究区滑坡危险度区划。通过定性和定量等精度检验和对比分析,证明了结合信息熵改进的证据权法所获得的滑坡危险度区划结果更准确且更符合实际。The landslide is a common geological disaster and has enormous hazardous. It has been an important active forecasting and alerting work of the disaster prevention and mitigation to zone scientifically the hazard. The weights of evidence method is improved to zone the landslide hazard by fully using some entropy characteristics based on the information entropy theory that is particularly suitable to determine the relative weights of the different factors for the same indicators. The landslide hazard in Taiwan was zoned by the improved weights of evidence method and the GIS technologies after the slide elements were compre- hensively considered and the disaster-causing evidence factors were extracted. The zoned results prove that the entropy-based weights of evidence method is more actual for the hazard zonation in the experimental site and the zoning precise is better through the qualitative and quantitative accuracy check and contrast analysis.
关 键 词:滑坡 证据权法 信息熵 危险度区划 ARCGIS
分 类 号:X43[环境科学与工程—灾害防治]
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