山地型县城的生态敏感性评价--以长汀县为例

Ecological Sensitivity Evaluation of Mountainous County-Taking Changting County as an Example

[目的]探究长汀县生态敏感性。[方法]以DEM数字高程数据和Landsat遥感影像数据为基础,选用高程、坡度、坡向、水系、植被5个因子构建生态敏感性评价的指标体系,对长汀县的单因子及综合生态敏感性进行评价。[结果]长汀县整体生态敏感性状态一般,不敏感区及低敏感区占研究区的58%,中度以上敏感区占研究区的42%。长汀县综合生态敏感性分布规律为中部高、四周低。区域中部、北部和东部为主要高敏感区,不敏感区、低敏感区主要分布在研究区西部四都镇、古城镇、管前镇、宣城乡等地区;大同镇等区域大部分为中敏感区;红山乡、铁长乡等地区大部分为高敏感区、极高敏感区。[结论]该研究为长汀县以及类似的山地型县城的可持续发展提供理论参考。

[Objective]To explore the ecological sensitivity of Changting County.[Method]Based on DEM digital elevation data and Landsat remote sensing image data,the index system of ecological sensitivity evaluation was constructed with five factors,namely elevation,slope,aspect,water system and vegetation,and the single factor and comprehensive ecological sensitivity of Changting County were evaluated.[Result]The ecological sensitivity of Changting County was general,with insensitive and low sensitive areas accounting for 58%and moderately sensitive areas accounting for 42%.The distribution law of comprehensive ecological sensitivity in Changting County was high in the middle and low around.The central,northern and eastern parts of the region were the main high sensitive areas,while the low sensitive areas were mainly distributed in Sidu Town,Ancient Town,Guanqian Town and Xuancheng Township in the west of the study area Datong Town and other areas were mostly sensitive areas.Hongshan Township and Tiechang Township were mostly high and extremely sensitive areas.[Conclusion]This study provides a theoretical reference for the sustainable development of Changting County and similar mountainous counties.