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重庆市万州区公路洪灾孕灾环境分区

, PP. 89-94

Keywords: 孕灾环境分区,公路洪灾,层次分析法,地理信息系统,万州区,environmentzoningofgeologicalhazardsdeveloping,roadflood,AnalyticalHierarchyProcess(AHP),GIStechnology,Wanzhouarea

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Abstract:

:?针对重庆市万州区公路洪灾,选择公路沿线地质灾害发育、暴雨强度、洪水频次、地貌条件、岩性条件、年均降雨量、植被覆盖度与地质构造等8个孕灾环境指标,通过层次分析法确定其权重,提出了孕灾环境指数评价模型。在GIS技术支持下,以网格为单位提取出各网格的孕灾环境指数,据此结合万州区乡镇级行政区划将万州区公路洪灾孕灾环境划分为4个等级区,即危险区、高易发区、中易发区与低易发区。通过研究其成果对公路洪灾风险评价具有一定实用价值。

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