广西红水河流域生态安全综合评价

目的]对广西红水河流域生态安全进行综合评价。方法]以＂压力-状态-响应＂模型框架为基础,建立广西红水河流域生态安全综合评价指标体系,利用RS和GIS技术提取生态安全评价指标信息;根据生态安全指数将红水河流域的生态安全划分为5个等级,分析各种生态安全等级的分布和特点,并针对存在的生态安全问题提出维护红水河流域生态安全的对策。结果]广西红水河流域以一般安全状态占有的面积比例最大,占全流域总面积的74.25%,凌云、凤山、都安、大化、上林、宾阳和桂平等县（市、区）分布面积比较大;其次是较安全状态（12.74%）,这两种等级的生态安全区域是红水河流域最主要的环境区域。造成红水河流域生态安全问题的原因主要包括自然环境脆弱、经济发展落后、人口增长过快以及自然资源的过度开发利用等。结论]该研究为合理开发利用红水河流域国土资源、保护与建设生态环境提供了科学依据。

Ecological Security Assessment of Red River Basin in Guangxi

Objective] The study aimed at assessing the ecological security of Red River basin in Guangxi.Method] Firstly,the ecological security assessment index system of Red River basin was established based on the framework of "pressure-state-response" model,and the information of indices in ecological security assessment was extracted by using RS and GIS technology;afterwards,the ecological security of Red River basin was divided into five grades according to ecological security index,and the distribution and characteristics of ecological security at various levels were analyzed;finally,the measures to maintain the ecological security of Red River basin were put forward on the basis of problems in ecological security.Result] Most areas of Red River basin in Guangxi were in general security state,especially Lingyun,Fengshan,Du'an,Dahua,Shanglin,Binyang,Guiping,etc.,and the area accounted for 74.25% of total area;next came safer state(12.74%),the regions in the two states above were the most important environmental areas in Red River basin.The problems in the ecological security of Red River basin were mainly related to fragile ecological environment,lagging economic development,rapid population increase,excessive development and utilization of natural resources and so on.Conclusion] The research could provide scientific references for the rational development and utilization of land resources,protection and construction of ecological environment in Red River basin.