基于生态和社会经济约束的区域土地整治潜力评价研究

准确评价区域耕地整治、农村居民点整治、废弃地复垦和未利用地开发4种类型的土地整治潜力是实现区域统筹规划和保障粮食安全的重要前提。通过选取能反映区域四种土地整治类型内在和外在潜力的指标因素,引入生态安全和社会经济双重制约条件,结合层次分析法和约束条件评价模型对研究区域生态安全和经济社会约束下的土地整治综合潜力开展定量评价,并采用K-Means聚类方法进行潜力分区。研究结果表明:高生态安全和经济发展水平条件能提高区域土地整治潜力水平,反之则制约土地整治潜力水平,同时根据约束条件的土地整治潜力评价结果将研究区域划分为土地整治高潜力区、较高潜力区、一般潜力区和低潜力区,与无约束条件下的土地整治潜力评价结果相比,该分区结果更加符合当地实际情况。该研究一方面可为生态文明建设背景下的土地整治潜力评价提供新方法,另一方面可为新一轮土地整治统筹规划提供有效的依据和参考。

THE REGIONAL LAND CONSOLIDATION AND REHABILITATION POTENTIAL EVALUATION UNDER THE CONSTRAINTS OF ECOLOGY AND SOCIO-ECONOMY

The new-type land consolidation and rehabilitation include arable land consolidation, rural residential land consolidation, disused land rehabilitation and unused land reclamation. It is an important prerequisite for realizing the regional master planning and food security guarantee to evaluate accurately the regional land consolidation and rehabilitation potential. This paper firstly selected characteristic indicators which could reflect the internal and external potential of four types of land consolidation and rehabilitation. Secondly, it brought in ecological security and socioeconomic constraint indicators and built a constraint evaluation model to quantitatively evaluate the land consolidation and rehabilitation comprehensive potential under ecological security and socio-economic constraint in the study area, combined with analytic hierarchy process method. At last it partitioned the study area by the K-Means clustering algorithm based on the evaluation result. The results show that the high ecological security condition and socio-economic development can promote the regional land consolidation and rehabilitation potential, oppositely low ecological security and the slow economic development restricts that. At the same time the study area was divided into high potential zone, less high potential zone, general potential zone and low potential zone based on the evaluation values from high to low. The evaluation result and partition under constraints were in more accord with the actual land consolidation and rehabilitation potential. On one hand this study can provide a new method for evaluating land consolidation and rehabilitation potential under ecological civilization, on the other hand it also can provide effective basis and reference for the new round of master planning of land consolidation and rehabilitation.