【摘要】 土地退化灾害的发育、形成及其活动,都具有明显的景观区域性特点。以广西都安瑶族自治县为例,应用层次分析法和G IS技术的空间分析功能建立了评价因素的数据库,利用区域的综合分析和一定的数学模型,对土地退化的生态破坏度和区域环境灾害风险度进行了定性与定量相结合的综合评价与分区,为喀斯特脆弱环境的综合治理与土地可持续利用提供科学依据。更多还原

【Abstract】 The formation development,and activity of land degradation all possess obvious regional characteristics on landscape.Taking Du’an Yao Autonomous County as an example,and based on the spatial analysis function of AHP and GIS,the database for evaluation factors is established.Using regional synthetic analysis and certain mathematic models,comprehensive evaluation and zoning for ecological distructive degee of land degradation and risk degree of regional environmental disasters are carried out qualitatively and quantitatively.The work provides a scientific basis for synthetic control and sustainable landuse of frail karst environment.更多还原