Under different green belt interval width, height and road direction, the characteristics of the mirco canyon effect were discussed through field survey in Xuchang.The results showed that the width of the green belt is between 0.7 m and 4.7 m with different micro canyon effect.The height of the green belt is between 0.55 m and 0.80 m.The micro canyon effect is the most obvious when the height of the green belt is 0.75 m.The rate of wind speed changes are respectively 58% and 106% in East-West direction and North-South direction where the wind speed changes of the latter is bigger than the former.%通过实地测量,研究了许昌市道路绿化带不同间隔宽度、不同高度、不同走向的微峡谷效应变化规律.结果表明:绿化带间隔宽度在0.7~4.7 m之间时,均表现出不同程度的微峡谷效应,当绿化带宽度为1.8 m时,微峡谷效应最显著;绿化带高度介于0.55~0.80 m之间时,均表现出微峡谷效应,当绿化带高度为0.75 m时,微峡谷效应最显著;东西走向的风速变化率为58%,南北走向的风速变化率为106%,南北走向的风速变化率大于东西走向.
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