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成都市中心城区绿色空间格局演变与 道路网络耦合分析
王倩娜,魏琪力,谢于松*,罗言云
0
作者简介:
摘要:
路网密度的提升会导致斑块破碎、栖息地减少等 现象。以成都市中心城区为研究对象,基于遥感影像获取 1995、2005、2015年的绿色空间数据,运用形态学空间 分析等方法明确了绿色空间格局演变特征及划分出绿地斑块 等级,同时针对包含高速公路在内的5种道路类型分别按照 100、500、1 000、2 000m的宽度建立缓冲区,分析出不 同道路类型在不同缓冲区下绿地斑块级别、面积和破碎化指数 的变化情况,总结了绿色空间破碎化与道路网络耦合的图谱关 系。1)土地利用变化以绿色空间面积转化为建设用地为主, 1995—2005年绿地斑块破碎呈穿孔状,2005—2015年进一 步向东北和西南向破碎。2)不同缓冲区范围内斑块级别呈低级 别斑块数量增加、整体面积占比小、高级别斑块数量增加、面 积下降明显的特点,同时绿地斑块面积有减小趋势,高速公路 对斑块面积的影响最大。各道路类型均呈缓冲区宽度越大对斑 块影响越弱的规律。3)1995—2015年,不同道路类型的破碎 化强弱不同,总体上景观结构进一步多样化,斑块破碎化现象 明显加剧,斑块形状呈单一化发展趋势,不同道路类型两侧的 绿地斑块形状复杂程度趋于相同。4)1995—2005年,斑块图 谱类型以零散为主,还包括中空、切割、分散类型;2005— 2015年,斑块图谱类型进一步演化,零散型增加明显。研究 结果能为道路网络规划和生态空间保护提供依据。
关键词:  风景园林  绿色空间  道路网络  斑块破碎化  耦 合分析  成都市中心城区
DOI:
基金项目:
Coupling Analysis of the Spatial Pattern Evolution of Green Space and Road Network in the Central City of Chengdu
WANG Qianna,WEI Qili,XIE Yusong,LUO Yanyun
Abstract:
The increasing density of urban road network will cause impacts such as patch fragmentation and habitat reduction. Taking Chengdu's central city as the research area, based on remote sensing images, the data of green space in 1995, 2005 and 2015 were obtained, and the spatial-temporal evolution of green space network structure elements, as well as the grade and evolution of patches were clarified by morphological spatial pattern analysis and other methods. Then, buffer zones of 100m, 500m, 1000m and 2000m were established for 5 road types including expressway. Finally, patch changes of different road types in different buffers were analyzed, and the graph relationship between green space fragmentation and road network coupling was summarized. The results showed that: 1) Land use changes are mainly due to the massive conversion of green space area into construction land. The fragmentation of patch in 1995-2005 was perforated, and in 2005- 2015 the patches were further broken to the northeast and southwest. 2) The number of low-grade patches in different buffer zones has increased, the overall area is small, and the number of high-grade patches has increased, and the area has declined significantly. The green patch area has a decreasing trend, and the highway has the largest impact area. Each road type shows the rule that the larger the width, the weaker the impact on the patch. 3) From 1995 to 2015, different road types had different strengths of fragmentation, but overall the landscape structure was further diversified, the phenomenon of patch fragmentation had become more obvious, and the shape of the patch had a single development trend. For green spots on both sides of different road types, the complexity of the block shapes tends to be the same. 4) In 1995-2005, the patches atlas types were mainly fragmented, also including hollow, cutting, scattered types. In 2005-2015, the patch types evolved further, especially the increase of fragmented type. The results can provide references for road network planning and ecological space protection
Key words:  landscape architecture  green space  road network  patch fragmentation  coupling analysis  Chengdu central area

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