“生态—效率”约束下工业用地减量化空间识别——以江苏省沿江经济带为例

Spatial Identification of Industrial Land Reduction under“Ecology-efficiency”Constraints:A Case Study of the Yangtze River Economic Belt in Jiangsu Province

研究目的:以生态保护与用地效率双重约束视角识别低效工业用地,探索其退出与利用转型路径,为工业用地减量化治理提供新思路。研究方法:基于“源地识别—廊道提取”研究范式构建区域生态安全格局,考虑生境隔离度评价并耦合低效工业用地评价构建工业用地分类治理四象限模型,综合判定江苏省沿江经济带工业用地减量化区域。研究结果:(1)江苏省沿江经济带共有52处生态源地,分布零散,呈现“江南多于江北”的空间格局,总面积3007.65 km~2,生态廊道共有134条,总长度2934.78 km,呈“西南多东北少”的分布格局。(2)无锡市、苏州市、南京市、常州市工业用地布局与生态用地之间冲突较为显著。(3)亟需腾退的工业用地总面积为82.10 km~2,集中分布于南京栖霞及江宁区、无锡惠山区、常州宜兴市、南通如东县、镇江京口区。研究结论:采用“生态—效率”双重约束能兼顾生态保护约束和效率提升需求,可以有效识别区域低效工业用地,为推进工业用地减量化提供科学依据。

The purposes of this study are to identify inefficient industrial land from the dual perspectives of ecological protection and land use efficiency and to explore the pathways for its withdrawal and transformation,to provide new insights for the reduction governance of industrial land.The research methods involve the paradigm of“ecological source identification—ecological corridor extraction”to construct a regional ecological security framework and integrate habitat isolation assessment with the evaluation of inefficient industrial land,which develops a four-quadrant model for the classification and management of industrial land and facilitates the comprehensive determination of industrial land reduction areas along the Yangtze River Economic Belt in Jiangsu Province.The research results show that:1)there are 52 ecological sources along the Yangtze River Economic Belt in Jiangsu Province,which are scattered and exhibit a spatial pattern of“more in the south of the Yangtze River than in the north,”with a total area of 3007.65 km2.Additionally,there are 134 ecological corridors with a total length of 2934.78 km,showing a distribution pattern of“more in the southwest than in the northeast.”2)Significant conflicts between industrial land layout and ecological land are observed in Wuxi,Suzhou,Nanjing and Changzhou.3)The total area of industrial land that urgently requires withdrawal is 82.10 km2,primarily concentrated in Qixia District and Jiangning District of Nanjing,Huishan District of Wuxi,Yixing City of Changzhou,Rudong County of Nantong and Jingkou District of Zhenjiang.In conclusion,the dual-constraint evaluation method of“ecology-efficiency”can integrate ecological protection constraints and land use efficiency improvement demands,effectively identify inefficient industrial land areas,and provide a scientific basis for promoting industrial land reduction.