武汉市城市通风廊道挖掘研究

摘要

城市通风廊道是利用夏季盛行风改善城市气候和环境的一种生态节能方式.通风廊道即气流可顺畅流过的区域,使城市外围郊区新鲜洁净的冷空气通过通风路径导入城市内部.本文梳理出当前普遍使用的通风廊道划分方法——基于粗糙度长度和迎风面积密度.在迎风面积密度划分方法的基础上,提出了基于街道高宽比和高度变化程度的风道划分方法.以武汉市主城区建成环境为例,在迎风面积密度较高的区域,可以采用街道高宽比和高度变化进行深度挖掘.%Urban ventilation path is an ecological energy saving way to improve the urban climate and environment by using summer monsoon.The air can smoothly pass the area which is in the ventilation path.The fresh clean air can be brought into the city from outside by the ventilation path.The paper gives two morphological parameters to divide the ventilation path-Roughness Length (RL) and Frontal Area Density (FAD).Based on the method of FAD,the paper gives the method of building height to width ratio and height variations.As an example of Wuhan,the results show that building height to width ratio and height variations may be used to deeply mine the ventilation path in the high FAD area.