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对福州市仓山区9条主干道绿化带的行道树树种、种植结构和交通噪声、车流量进行调查.结果表明,在8:00~12:00及14:00~17:00时段,中心城区干道交通噪声在65.28~77.38 dB之间,污染较严重.绿化带配置方式可分为5种类型,其中单一乔木型和乔木+灌木型占76.5%.9条干道交通噪声的平均消减率为0.42%~7.31%,在监测点b(行道树冠在人行道方向的垂直投影点)处消减率以六一南路的最高(为3.86%),点c(离b点3 m)处则以三高路的最高(为5.90%).结合行道树种与配置方式,以乔木+乔木+灌木+草坪型(白兰花+大花紫薇)的减噪效果最佳(点b和c处减噪率分别为3.95%和7.28%).因中心城区干道绿地面积有限,行道树树种及其配置模式是影响绿化带减噪效果的关键因素.
The investigation of the tree species, planting structure, traffic noise and traffic volume of the 9 main greenway belts in Cangshan District, Fuzhou City was conducted. The results showed that during 8: 00-12: 00 and 14: 00-17: 00, Traffic noise is more serious between 65.28 and 77.38 dB.The allocation of green belt can be divided into five types, of which 76.5% are single tree type and tree + shrub type.The average reduction rate of traffic noise of the nine main roads is 0.42% ~ 7.31% at the monitoring point b (vertical projection of the canopy in the direction of the sidewalk) is the highest (3.86%) at Liuyi South Road and the highest at the point c (3 m from the b point) (5.90%) .In combination of tree species and configuration, the noise reduction effect of tree + tree + shrub + lawn type (white orchid) was the best (the noise reduction rates at points b and c were 3.95% And 7.28% respectively.) Due to the limited green space in the main urban road, the tree species and their distribution pattern are the key factors affecting the noise reduction effect of the green belt.