基于潜力-约束模型的冀中南区域建设用地适宜性评价

区域建设用地适宜性评价是区域规划空间布局的重要前提和基础，是区域土地资源合理利用的重要依据.基于GIS软件平台，采用区域综合实力与空间可达性分析方法对冀中南区域发展潜力进行了空间定量分析，采用生态环境敏感性方法对研究区发展的生态约束进行定量评价，进而借鉴损益分析法，构建了由发展潜力和生态约束构成的潜力-约束模型，并通过相互作用判别矩阵，得到不同发展理念下的建设用地适宜性情景方案.结果表明： 研究区综合实力与空间发展潜力均呈首位分布，且点轴发展模式明显；生态环境敏感性总体上呈西高东低的分布格局；区域经济发展理念对区域生态安全格局和城市建设用地增长空间规模具有重要影响.潜力-约束模型重新构建了区域用地发展适宜性的评判原则与方法，能够较为科学地实现区域综合发展潜力的空间栅格化，获取研究区未来用地的发展趋势和空间布局，可以为城市与区域规划提供科学依据，是实现区域“精明增长”与“精明保护”的有效途径.

Suitability assessment of construction land in the central and southern parts of Hebei Province, China based on potential-limitation model

The suitability assessment of regional construction land is one of the important prerequisites for the spatial arrangement in regional planning, and also, the important foundation for the reasonable utilization of regional land resources. With the support of GIS, and by using the regional comprehensive strength and spatial accessibility analysis and the eco environmental sensitivity analysis, this paper quantitatively analyzed the development potential and its ecological limitation of the central and southern parts of Hebei Province. Besides, based on the cost-benefit analysis, the potential-limitation model was accordingly developed, and the three land suitability scenarios under different developmental concepts were captured through the interaction matrix. The results indicated that both the comprehensive strength and the development potential of the study area showed a primacy distribution pattern, and presented an obvious pole-axis spatial pattern. The areas with higher eco-environmental sensitivity were mainly distributed in the west regions, while those with lower eco-environmental sensitivity were in the east regions. Regional economic development concept had important effects on the regional ecological security pattern and urban growth. The newly developed principles and methods for the land suitability assessment in this paper could not only scientifically realize the spatial grid of regional development potential and capture the future land development trend and spatial distribution, but also provide scientific basis and effective ways for urban and regional planning to realize region ‘smart growth’ and ‘smart conservation’.