农牧交错带城市人居环境自然适宜性评价

基于GIS技术与遥感图像,通过建立矢量格网运算地形起伏度、气候适宜度、地被指数与水文指数4项指标,难以找到绝对最优的人居自然适宜性格网样本。通过变异系数确定权重进行综合人居自然适宜性评价,结果显示南部6县适宜性指标值普遍高于北部6县,与经济发展水平和人口流向恰恰相反。在能源开采的短时间内出现人口数量严重超出生态环境承载力,可以通过经济杠杆加大生态建设投入以弥补,但若人口数量长期保持在较高水平,会对当地生态环境造成不易恢复的严重破坏。

Assessment on the Natural Suitability for Human Settlements in Farming-pastoral Ecotone of Cities

Based on the GIS technology and remote sensing image, through the establishment of vector grid operation on four factors as RDLS, CI, WRI and LCI, it is difficult to find the grid sample act as the absolute best natural living appropriate character. Using the coefficient of variation as weight to evaluate the comprehensive natural living appropriate index, the results showed that the index values in the southern six counties were higher than the northern six ones, and that was contrary with the economic development level and the population flow trend. It was thought that if the number of population exceeds the bearing capacity of ecological environment seriously on temporary during the mining period, it can be made up for by strengthening the ecological construction investment through economic levers. But if the density of population keeps on a high level for a long time, it would cause a serious destruction on the local ecological environment and is hard to recover.