区域城乡建设用地统筹效益灰色关联度差异分析

Analysis of gray related degree differences in balancing regional urban and rural constructive land

城乡建设用地统筹是城镇与农村建设用地指标进行挂钩的表现,是提高城乡土地集约利用水平的重要途径.以兰州市为研究对象,分析了2003年～2005年间城乡建设用地和耕地的变化情况;构建了评价指标体系;采用灰色综合评价法计算了各研究区的灰色关联度;对各区域灰色关联度的差异进行了对比分析,并提出了具体的改善措施.研究结果表明,在研究期期间,兰州市耕地面积在减少,建设用地面积在增加;城区城乡建设用地统筹的效益好,但整个兰州市潜力比较大,郊县是城乡建设用地统筹的重点;要提高城乡建设用地的统筹效益,须提高人口与建设用地弹性指数、建设用地城镇化指数和城乡建设用地协调指数的关联度,控制人口增长的同时提高建设用地人几密度,加紧农村居民点的整理与改造.

Balancing land use between urban and rural area is an expression of coordination in constructive land use index of urban and rural area, and it is the important manner of improving intensive utilization level of urban and rural land. This paper takes Lanzhou City as the researching object, analyzes the changes of constructive land and cultivated land in the urban and rural area during 2003～2005. We constructed the appraisal indicator system, calculated the gray related degree adopting gray comprehensive appraisal method, compared the differences among the gray related degrees, and gave some suggestions on improving gray related degrees. The results show that the cultivated land areas are decreasing and the constructive land areas are increasing. The benefit of balancing in urban is better than that in rural, and Lanzhou City has great potential, especially in counties. To improve the benefit of balancing constructive land in urban and rural area, we should improve the degree of association between the following three aspects： elastic index of population and constructive land; index of urbanization of constructive land; index of coordination between urban and rural constructive land. We should on one hand bring the growth of population under control, and on the other hand improve the density of population on constructive land, intensify the reorganization and transformation of rural settlement.