绿化带对交通噪声衰减效果对比分析

选取福州市三环路的绿化带进行实验,主要以樟树与灌木、黄槐与灌木、刺桐与灌木、羊蹄甲与灌木绿化带作为研究对象,研究不同树种的郁闭度,在不同噪声强度下,各树种搭配衰减效果,进一步分析郁闭度与单位长度绿化带衰减效果的相关性。结果表明:刺桐与樟树绿化带郁闭度较高,黄槐次之,羊蹄甲郁闭度最低;黄槐的降噪效果最为明显,其次是樟树与刺桐,羊蹄甲的降噪效果最差,且噪声声级越高,绿化带衰减效果也越理想;郁闭度与噪声衰减值关系相关性较差,郁闭度需结合树木枝叶相关特征来分析整个树木的空间立体结构,进而建立与衰减效果之间关联。

Comparative Analysis of the Effect of Green Belt on Traffic Noise Attenuation

The green belt of Fuzhou Sanhuan Road was selected for experiment,mainly with camphor trees and shrubs,yellow locust and shrubs,erythrina and shrubs,Bauhinia and shrub green belts as the research objects to study the canopy closure of different tree species.Under the noise intensity,each tree species is matched with the attenuation effect,and the correlation between the canopy closure and the attenuation effect of the green belt per unit length is further analyzed.The results showed that the canopy closure of Erythrina and camphor trees was higher,followed by Sophora japonicus,and Bauhinia canopy closure was the lowest;Sophora japonica had the most obvious noise reduction effect,followed by camphor and Eryngium,and Bauhinia japonica had the highest noise reduction effect.The higher the noise level,the more ideal the attenuation effect of the green belt;the correlation between the canopy closure and the noise attenuation value is poor,and the canopy closure needs to be combined with the characteristics of tree branches and leaves to analyze the spatial threedimensional structure of the entire tree,and then establish Correlation with the attenuation effect.