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| 街区空间PM2.5浓度分布及其与街区空间形态的关联性研究 |
| Study on Spatial Distribution of PM2.5 Concentration in Urban Blocks and Its Correlation with Block Shapes |
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| DOI： |
| 中文关键词: PM2.5 城市街区 空间形态 设计指标 贡献度 合肥市云谷路 |
| 英文关键词: PM2.5 Urban block Spatial shape Design index Contribution rate Yungu Road, Hefei |
| 基金项目:国家自然科学基金资助项目（52478016）；安徽省自然科学基金资助项目（2308085ME182）；安徽省重点研究与开发计划基金资助项目（2023g07020003）；安徽省高校协同创新基金资助项目（GXXT-2023-091） |
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| 中文摘要: |
| 城市街区不同空间形态对街区空间PM2.5质量浓度的影响存在显著差异。选取合肥市云谷路为研究对象，通过监测沿街空间的PM2.5质量浓度、空气温度、相对湿度和风速等数据，揭示街区PM2.5质量浓度的时空分布特征。在此基础上选取开敞度、退让距离、迎风面积比、平均高度、天空开阔度5项空间形态设计指标，分析其与PM2.5质量浓度之间的关联性。结果表明：街区空间PM2.5逐时质量浓度变化曲线整体呈现先上升后下降的趋势，波峰出现在11：30前后，波谷出现在16：30前后，受早晚高峰期车流量影响显著；开敞度、天空开阔度与PM2.5质量浓度呈负相关关系，迎风面积比、平均高度与PMPM2.5质量浓度呈正相关关系；空间形态设计指标对PM2.5质量浓度变化的贡献度从高到低为天空开阔度（49.0%）＞平均高度（19.6%）＞开敞度（16.4%）＞迎风面积比（15.0%）。 |
| 英文摘要: |
| There are significant differences in PM2.5 mass concentration in different spatial shapes of urban blocks. Yungu Road in Hefei was selected as the research object， the spatial and temporal distribution characteristics of PM2.5 mass concentration were studied by monitoring PM2.5 mass concentration， air temperature， relative humidity in urban blocks. On this basis， five spatial shape design indexes， including openness， setback distance， windward area ratio， average height and sky openness were selected to analyze the correlation between them and PM2.5 mass concentration. The results indicated that the change curve of hourly PM2.5 mass concentration in the block showed an trend of first increasing and then decreasing， with the peak appearing around 11：30 and the trough appearing around 16：30， which was significantly affected by the traffic flow during morning and evening rush hours. Openness and sky openness were negatively 〖GK!86mm〗correlated with PM2.5 mass concentration， while windward area ratio and average height were positively correlated with PM2.5 mass concentration. The contribution rate of spatial shape design index to PM2.5 mass concentration was ranked from high to low as sky openness（49.0%），average height（196%）， openness（16.4%）， windward area ratio（15.0%）. |
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