基于3S技术的城市辐射效应景观分析——以蓬莱市为例

Buffer analysis of landscape structure for the radiation distance of urbanization based on 3S technique:A case study of Penglai city

本文在3S技术的支持下采用缓冲区分析,从景观和斑块两个层次对蓬莱市城市辐射效应与景观结构关系进行了研究。结果表明:在景观层次上,随着城市辐射距离的增加,景观破碎化降低。在斑块层次上,蓬莱市的城市辐射效应对果园和水浇地的影响较大,最大距离是25km;对其他斑块类型影响不大。这表明山东半岛城市化进程加剧了景观的破碎化,而且这一过程主要是通过影响果园和水浇地斑块来实现的。

By the method of buffer analysis, this paper has studied the effect of the radiation distance of urbanization influence upon landscape structure in landscape and patch levels base on 3S techniques. Results showed that： Landscape fragmentation decreased with the increase of radiation distance of urbanization in landscape scale. The impact of the radiation distance of urbanization influence upon orchard and irrigated cropland was significant in patch scale, and maximum distance reached 25km. However, the influence of urbanization was less on other patch types. This conclusion indicated that the urbanization process obviously resulted in the landscape fragmentation, which was induced by fluctuation of the orchard and the irrigated cropland patches.