基于GIS的模糊数学模型在泥石流敏感性评价中的应用

发布时间：2018-05-01 05:02

本文选题：泥石流 + 模糊数学　；参考：《自然灾害学报》2017年01期

【摘要】：以四川省汶川县为典型研究区,采用GIS技术与层次分析法、模糊数学等数学模型相结合的方法,进行了泥石流敏感性评价研究。选取流域高差、沟壑密度、沟道坡度、主沟纵比降、崩滑体核密度强度、年最大日降雨量等6个指标作为评价因子,构建了泥石流敏感性评价指标体系。采用模糊综合评判法对汶川县160条泥石流的敏感性进行了评价,利用ARCGIS空间分析功能求出了每个因子对上一级的隶属度图层。最后,根据最大隶属度原则,选取每个流域上泥石流的敏感性隶属度的最大值作为该流域单元泥石流的敏感性等级。检验分析表明,评价的泥石流敏感性空间分布与实际调查结果较为吻合。
[Abstract]:Taking Wenchuan County in Sichuan Province as a typical research area, the sensitivity evaluation of debris flow was studied by using the methods of GIS and AHP, fuzzy mathematics and other mathematical models. The evaluation index system of debris flow sensitivity was constructed by selecting six indexes, such as watershed height difference, gully density, channel slope, main trench longitudinal ratio decline, density intensity of collapse and slip body, annual maximum daily rainfall, as evaluation factors. The sensitivity of 160 debris flows in Wenchuan County was evaluated by fuzzy comprehensive evaluation method, and the subordination layer of each factor to the upper level was obtained by using ARCGIS spatial analysis function. Finally, according to the principle of maximum membership, the maximum sensitivity of debris flow in each watershed is selected as the sensitivity grade of debris flow. The results of test and analysis show that the spatial distribution of debris flow sensitivity is in good agreement with the actual investigation results.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;成都理工大学地球科学学院;
【基金】：科技部科技基础性专项课题(2011FY110100) 中国地质调查局项目(12120113009900) 国家重点实验室团队项目(SKLGP2012Z002)~~
【分类号】：P642.23

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