多时相遥感数据在四川省茂县景观生态安全格局评价中的应用

以Landsat系列遥感数据为基础数据源,基于"压力-状态-响应"模型和景观生态学理论,采用层次分析法构建茂县景观生态安全评价指标体系,利用综合指数法分别获取研究区2000年、2007年、2015年的景观生态安全综合指数值;并结合景观生态安全系统分级标准用ArcGIS软件将四川省茂县的景观生态安全状况,定量分析出危险级、风险级、敏感级、良好级、安全级5个等级;再利用转移矩阵剖析2000—2015年期间四川省茂县景观生态安全动态变化过程。研究表明:茂县生态安全状况之间的转换平稳,且转换面积和比重保持在一定的范围。该研究思路与研究结果可为四川省茂县区域宏观规划及山区地貌景观有效评估提供参考与借鉴。

Landscape ecological security assessment based on multi-temporal remote sensing data in Maoxian County of Sichuan

Using a series of Landsat remote sensing data as basic data source,based on the"pressure-state-response"model and theory of landscape ecology,the landscape ecological security index values are obtained in 2000,2007 and 2015 by building Maoxian landscape ecological security evaluation index with AHP system and using comprehensive index method.Under landscape ecological security system grading standards,this paper classifies the landscape ecological security quantitatively and statistically as bad grade,risk level,sensitive stage,a good level and security level with ArcGIS.Then,the landscape ecological security dynamic process of Maoxian in 2000,2007,2015 with transfer matrix method analyzed. This study shows that the transition of Maoxian ecological security is smooth and the conversion area and the proportion are maintained at a certain range.The result will provide a reference for the macroscopic plan and effective assessment in mountainous landscape.