基于RS与GIS的流域生态安全评价研究

Research on Ecological Security Evaluation of River Basin Based on RS and GIS

流域生态安全评价是实现流域可持续发展的一项重要调控措施。该文基于1988、1998和2007年的遥感影像,以生态环境的压力-状态-响应概念模型为指导,构建了多层次指标体系,采用综合评价方法对东江流域各县市的生态安全状况进行了评价,并构建了生态安全动态度模型,分析了东江流域各县市1988~2007年间生态安全变化的趋势和程度。结果较准确地反映了东江流域各县市的生态安全状况,可为流域生态安全的管理和保护提供辅助决策。

Ecological security evaluation of river basin was one of the important regulation and control measures for realizing the sustainable development of river basin.Based on the remote sensing image in 1988,1998 and 2007,and taking Pressure-State-Response Model of ecological environment as guidance,multilayer index system was constructed,in addition,the ecological security conditions of every county and city in Dongjiang river basin were evaluated by using comprehensive evaluation methods,and ecological environment dynamic model was established,the variation trend and degree of ecological security during 1988-2007 in every county and city of Dongjiang river basin was analyzed.The results reflected the ecological security conditions of every county and city in Dongjiang river basin accurately,which provided the aid decision making for the management and protection of river basin ecological security.