城镇建设用地生态适宜性评价研究  ———以重庆市荣昌县为例

SUITABILITY ASSESSMENT ON URBAN CONSTRUCTION LAND USE ———A CASE STUDY IN RONGCHANG OF CHONGQING CITY

关键词:  景观指数法 生态适宜性评价 城镇建设用地 GIS

Key words:  landscape index method  ecological suitability assessment  construction land use  GIS

摘要:

为更加深入地了解县域尺度城镇建设用地生态适宜性情况，实现土地资源的合理可持续利用。以 重庆市荣昌县为例，采用AHP法和GIS空间分析技术，选择了地形、社会条件和生态安全3大类8个指 标，建立了适用于浅丘区土地生态适宜性评价指标体系，分析了荣昌县中心城区生态景观格局和建设用地 生态适宜性分布。结果表明:荣昌县不同景观类型之间生态景观指数差异较大，但各种景观类型分布比较 均匀。荣昌县中心城区适宜分布建设用地的面积大，未来城镇建设开发潜力大，其中最适宜和适宜开发的 面积为1.288 55万hm 2 ，占中心城区面积的34.85%;可适度开发的土地面积为1.0 59 878万hm 2 ，占中心 城区面积的28.67%。因此，今后荣昌县应在生态环境许可的条件下，采取差别化政策对待不同区域土地 利用与保护，更加充分合理利用每一寸建设用地。

Abstract:

In order to deeply understand the ecological suitability for urban land at country scale， and achieve the goal of reasonable and sustainable utilization of land resources， this paper analyzed the ecological landscape pattern and the ecological suitability distribution of construction land， established the ecological suitability evaluation index system based on the index of terrain， social conditions and ecological security with the method of AHP and GIS in Rongchang of Chongqing City. The results showed that there was a huge difference among all different styles of landscape， but the distribution of landscape was still uniform. The central city of Rongchang County had a big po- tential for development of towns construction， the best or suitable construction land was 12 885.50hm 2 ， accounting for 34.85% of the total area of the county; the area that could be developed moderately for construction purpose was 10 598.78hm 2 ， accounting for 28.67%. Therefore， it should take differentiated policy for different regional land use and protection and make full use of every inch of construction land within the conditions of the ecological environment.