西安都市圈道路网络化对景观格局的影响

doi:10.13278/j.cnki.jjuese.201705206

Abstract

Abstract: The fast extension of traffic network results in the fragmentation of ecological landscape due to the division, isolation and damage and largely transforms the landscape process and pattern in urbanizing area. In this paper, the Xi'an metropolitan zone was analyzed as a case study. Based on remote image and employing spatial analysis method, the spatial structure of road network and the evolution of landscape pattern were evaluated. Furthermore, the influence of road network on landscape pattern was analyzed in term of spatial perspective. The results show as follows:1) From 1985 to 2015, the road network of Xi'an metropolitan zone had been improved and make complicated constantly. Basically, except for Yangling and Yanliang district, the spatial index of road network tends to gradually decrease away from the downtown of Xi'an, and that tends to be higher in the east than in the west. 2) With the improvement of urbanization, the landscape characteristics in whole were more fragmented, diversified and complicated in Xi'an metropolitan zone. Specifically, the areas of orchard, forest,and built-up land were expanding and that caused the increase of the degree of landscape aggregation whilst the fragmentation degree of farmland, water body and beach land has increased seriously. 3) During recent three decades, with the increasing construction of traffic road in whole region, the road network of Xi'an metropolitan area is gradually improved; While the landscape dominance is decreased, the fragmentation degree is increased. In addition, the influences of the road network on different land types were varied due to its development degree:In road developed area, the built-up land is large, regular in shape, and aggregated, but the forest area is less, that scattered and more fragmented; While in road poor area, the degree of aggregation of the forest patches is high, but the farmland, water body and beach land are more fragmented, and their shape is irregular.

Key words: road network, spatial index of road network, landscape pattern, Xi’an metropolitan zone

CLC Number:

P901

Song Bingjie, Zhou Zhongxue. Influence of Road Network on Landscape Pattern in Xi'an Metropolitan Zone[J].Journal of Jilin University(Earth Science Edition), 2017, 47(5): 1521-1532.

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