南昌市建设用地适宜性扩展路径研究

快速城市化过程中，建设用地持续吞噬优质土地资源，造成生态环境恶化。本文以移动窗口法获取建设用地源地，选取经济和社会因子构建阻力体系，生成MCR面，通过自然断点分级法获取适宜性分区，通过ArcGIS中的Hydrology扩展模块获得适宜扩展路径、生态隔离带和生态关键点，为未来城市建设用地扩展方向和生态建设提供借鉴。结果表明：①南昌市70%的区域属于允许建设区，对于维持城市生态环境的重要区域，应当重点保护，兼顾经济-生态共同发展；②利用Hydrology扩展模块对南昌市MCR面进行进行特征提取，发现主城区北部和西部较适宜建设用地扩张；③生态关键点对于维持城市生态环境具有重要作用，未来规划中应重点保护，限制开发。

Study on suitability expansion path of construction land in Nanchang city

In the process of rapid urbanization, construction land continues to devour high-quality land resources, resulting in deterioration of the ecological environment.In this paper, the mobile window method is used to obtain the construction land source, the economic and social factors are selected to build the resistance system, the MCR surface is generated, the natural breakpoint classification method is used to obtain the suitability partition, and the appropriate expansion path is obtained through the Hydrology expansion module in ArcGIS. The ecological isolation zone and ecological key points provide reference for the future urban construction land expansion direction and ecological construction.The results show that:①70% of the area in Nanchang belongs to the permitted construction area. For important areas that maintain the urban ecological environment, it is important to protect and take into account the common development of economy and ecology. ②Using the Hydrology expansion module to extract the features of the MCR surface in Nanchang city, it is found that the north and west of the main city are more suitable for construction land expansion. ③The key points of ecology play an important role in maintaining the urban ecological environment. In the future planning, key protection should be emphasized and development should be restricted.