基于GIS的合肥市景观空间格局分析

文章根据景观生态学原理,在地理信息系统(GIS)的支持下,从多样性、优势度、均匀性及分维数等指数对合肥市景观空间格局进行分析。结果表明,景观总体多样性指数为0.969,最大多样性指数为2.897,景观破碎化指数为0.00632,各景观类型分维度均在1.2左右,可见整个区域景观比较完整,无明显的破碎化现象;但合肥市景观格局总体呈现多样性程度偏低,斑块形状比较复杂,景观生态系统不稳定等特征;由此提出调整对策以便达到城市景观生态功能最大化,为制定合肥城市建设规划中的土地利用和管理提供理论依据。

GIS-based analysis of the landscape spatial pattern of Hefei City

Based on the theory of landscape ecology and the backing of the geographic information system(GIS),the landscape spatial pattern of Hefei City is analyzed by using such indexes as diversity,dominance,evenness,and fractal dimension.The results are as follows: the landscape overall diversity index is 0.969,the largest diversity index is 2.897,the landscape fragmentation index is 0.00632,and the fractal dimension is 1.2 more or less.The landscape throughout the region is comparatively complete without significant fragmentation,but the diversity index is somewhat low on the whole.The patch shape is quite complex,and the landscape ecosystem is comparatively unsteady.The adjusting measures are proposed in order to achieve the maximum ecologic functions of the urban landscape.This study provides a theoretic basis for formulating the land utilization and management plan of Hefei City.