Evaluation and Planning Strategy of Urban Street Green Space from the Perspective of Supply and Demand Balance: a Case Study of Hongjialou District in Jinan City
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摘要: 城市街道绿色空间是城市公共空间的重要组成部分,是人们感知城市最为直接的场所之一。在城市街道绿色空间供需平衡视角下,以济南市洪家楼街区为例,用街道绿视率水平和需求指数度量街道绿色空间供给水平和需求水平,借助百度地图、高德地图等开放平台数据,使用ArcGIS网络分析和Segnet语义分割等方法进行评估。结果表明:在绿色空间供给方面,济南市洪家楼街区的绿色空间供给水平整体不高,绿色空间供给良好的选点仅占比24%,花园路的绿色空间供给水平高于洪家楼南、北路;在绿色空间需求方面,花园路西段的需求最高,呈现出自西向东逐渐降低的变化趋势,并在中段间或出现几处较高的选点,而洪家楼南、北路则是南、北段的需求较高,中部较低,花园路的绿色空间需求高于洪家楼南、北路;在供需平衡方面,花园路的绿色空间供给与需求匹配度较高,洪家楼南、北路的绿色空间供给与需求匹配度较差,44.12%位于"低供给、高需求"象限。最后,从供给和需求两个方面,提出针对性的优化策略,研究可以为城市更新提供研究思路和方法参考。Abstract: Urban street green space is an important part of urban public space and one of the most direct places for people to perceive the city. From the perspective of supply and demand balance of urban street green space, taking Hongjialou block of Jinan City as an example, the supply and demand level of urban street green space was measured by street green visibility level and demand index. With the help of open platform data such as Baidu map and Gaode map, the supply and demand balance of urban street green space was evaluated by using ArcGIS network analysis technology and segnet semantic segmentation technology. The results showed that in terms of green space supply, the overall green space supply level of Hongjialou block in Jinan was not high, and only 24% of the sites with good green space supply were selected. The green space supply level of Huayuan road was higher than that of Hongjialou South Road and North Road. In terms of green space demand, the west section of Huayuan road had the highest street demand, showing a trend of gradually decreasing from west to east, and there were several spots with high street demand in the middle section, while Hongjialou South and North roads had higher street demand in the south and north sections, and lower in the middle. The street demand of Huayuan road was higher than that of Hongjialou South Road and North Road. In terms of supply-demand balance, Huayuan road had a high matching degree of supply and demand for green space, while Hongjialou South Road and North Road had a poor matching degree of supply and demand for green space, with 44.12% in the quadrant of "low supply and high demand". Finally, from the two aspects of supply and demand, the paper put forward targeted optimization strategies. The research could provide research ideas and methods for urban renewal.
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Key words:
- supply and demand balance /
- street /
- green space /
- quality /
- Jinan
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