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建模空气流动力学及其对杭州城市通风走廊中PM_2.5度的影响

Weiwu Wang¹, Huan Chen², Yong Lai³

¹College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; Institute of Urban and Rural Planning Theory and Technology, Zhejiang University, Hangzhou 310058, China.

The Science of the total environment

|December 1, 2024

概括

城市通风通道 (UVCs) 显著减少了微颗粒物 (PM2.5) 比非UVC区域更多的25.2%. 紫外线中心内的自然局部气候区 (LCZ) 进一步增强了PM2.5的减少,有助于城市空气质量管理.

科学领域:

环境科学环境科学
城市规划城市规划
大气科学大气科学

背景情况:

城市热岛效应和空气质量是重要的城市环境问题.
模拟大规模的城市通风走廊 (UVC) 和它们对微粒物质 (PM2.5) 的影响需要先进的方法.
现有的方法通常依赖于复杂的空气动力学计算,限制了更广泛的应用.

研究的目的:

引入一种新的电路理论方法来分析UVC和PM2.5度.
研究UVC属性,局部气候区 (LCZ) 和PM2.5水平之间的关系.
为UVC规划和污染物控制提供科学基础.

主要方法:

开发一种电路理论方法,整合通风潜在系数 (VPC) 和通风阻系数 (VRC).
结合电路理论方法与局部气候区 (LCZ) 地图进行空间分析.
在UVC和非UVC区域内模拟空气流和PM2.5度.

主要成果:

紫外线使PM2.5比非紫外线区域减少了25.2%;PM2.5与空气流有非线性关系,在0.6.以上显著下降.
紫外线在自然LCZ (71%) 占主导地位;LCZ A表现出最低的PM2.5度 (5.38μg/m3低于建成LCZ).
在UVC中的自然LCZ,特别是LCZ E,可以大幅减少PM2.5 (与非UVC相比,高达2.78μg/m3).

结论:

电路理论方法有效地分析了UVC及其对PM2.5.5的影响.
紫外线和特定的自然LCZ对于在城市环境中减轻PM2.5污染至关重要.
结果支持基于证据的城市规划,以改善空气质量和减少污染物度.

关键词:

模拟空气流的模拟电路理论模型的模型.当地气候区 (LCZ)在PM中{2.5)城市通风走廊 (UVCs) 是指城市通风走廊.

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