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首页> 外文期刊>Indoor and built environment >A quantitative method to detect the ventilation paths in a mountainous urban city for urban planning: A case study in Guizhou, China
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A quantitative method to detect the ventilation paths in a mountainous urban city for urban planning: A case study in Guizhou, China

机译：一种用于检测山区城市通风路径以进行城市规划的定量方法：以中国贵州省为例

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摘要

In this paper, a new frontal area index (FAI) mapping method is presented to describe the surface roughness of Renhuai, as an example of typical medium high mountain gorge type Karst city. Comparing with the traditional calculating method of FAI, a local topography (hills) factor is added to the calculation of the FAI in each 100 m x 100 m grid cell. The results show that the modified FAI is more strongly related to the mountainous land-use type than traditional, and local topography regions with large podium structure had higher values than other urban land-use types in mountainous city. With the frontal area index mapping procedure and a self-compiled least cost path analysis method, the potential airflow corridors traversing through the study area can be located, and the total computation time is shorter and less than 1s. Air volume, a significant measurement index of urban ventilation capacity, is then simulated in computational fluid dynamics model (CFD-PHOENICS) to confirm the significance and efficiency of these specific ventilation corridors. Based on our findings, the government and urban planners may use the descendent maps to understand the urban ventilation paths within a mountainous city for urban local renovation decisions.
机译：本文以典型的中高山峡谷型喀斯特城市为例，提出了一种新的额叶面积指数（FAI）制图方法来描述仁怀的地表粗糙度。与传统的FAI计算方法相比，在每个100 m x 100 m网格单元中的FAI计算中增加了局部地形因素。结果表明，改良后的固定资产投资与山区土地利用类型的关系比传统的更为紧密，裙房结构较大的局部地形区域的价值高于山区城市的其他城市土地利用类型。通过额叶面积指数映射程序和自编译的最小成本路径分析方法，可以定位穿过研究区域的潜在气流通道，并且总计算时间较短且小于1s。然后，在计算流体动力学模型（CFD-PHOENICS）中模拟作为城市通风能力的重要衡量指标的风量，以确认这些特定通风走廊的重要性和效率。根据我们的发现，政府和城市规划人员可能会使用后代地图来了解山区城市中的城市通风路径，以进行城市本地改造决策。

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