摘要
针对滑坡灾害易发性难以定量评价的问题,提出了以汇水域为基本统计单元,层次分析法与信息量法相结合的滑坡易发性评价模型。该模型是在综合分析已有监测数据的基础上,建立了坡度、黄土分布、土地表覆被、水系、断层、高程、地表粗糙度、坡向等8类要素与滑坡稳定性的相关性,根据评价结果将滑坡易发性划分为5个不同的等级。基于新疆新源县滑坡易发性评价的实验结果表明,该模型评价结果与滑坡实际分布情况相符,能够准确对不同汇水域灾害易发性进行分级评价,可以为相关部门进行防灾、预警提供一定的数据支持。提出了一种主观判断与客观分析相结合的方法,回答了"什么地方最容易发生地质灾害"的问题。
Aimed at the difficulty of assessing the vulnerability of landslide hazard, a susceptibility as- sessment model is proposed by combining analytic hierarchy process and information quantity method, taking catchment as the basic statistical unit. Based on the comprehensive analysis of history data, the pro- posed model established the relationship between the stability of landslide and eight different factors, in- eluding slope, loess distribution, surface cover, water system, fault, elevation, surface roughness, as- pect etc. , then the stability of landslide is classified into five different grades. The application result in Xinyuan County in Xiniiang shows the consistence between assessment result and the reality of landslide distribution, it is possible to provide reliable scientific information for relevant departments in disaster prevention and early warning. The method of combining subjective judgment and objective analysis helps toanswer the question of ＂which place is the most reliable to have geological disaster＂
出处
《测绘科学》
CSCD
北大核心
2017年第9期82-87,共6页
Science of Surveying and Mapping
基金
国家重点研发计划子课题(2016YFC080310402)
关键词
滑坡灾害
易发性评价
汇水域单元
层次分析法
信息量法
landslide disaster
susceptibility assessment
catchment unit
analytic hierarchy process
information quantity method
