城郊公路绿化带植物降噪服务功能及价值研究

Research on Service Function and Value of Greenbelt Noise-reduction of Suburban Road

城郊公路的交通噪声污染影响了城市形象和沿线居民的身心健康,合理的绿化能减轻噪声的影响。对柳州市柳长路绿化带进行生态结构调查和噪声测定,分析全乔型、乔灌型、全灌型和全草型4种典型绿化带的降噪效果,并计算绿化带的降噪功能量及价值量,研究其生态效益。结果表明,不同类型绿化带对交通噪声的降噪效果不同,乔灌型最佳,全草型最差。所有类型的绿化带在10~30 m处均能有效地降噪。柳长路各类型绿化带降噪功能量为77914.65 d B(A)/a,降噪总价值量为543065.10元/a;乔灌型营造模式的面积占总绿化面积的55.41%,降噪价值量占总量的67.75%。

Traffic noise pollution of suburban road affects the image of city,physical and mental health of residents,and reasonable greening can reduce impact of noise.Greenbelt ecological structure of Liuchang road in Liuzhou was investigated and noise was determined.Noise reduction effects of all arbor,arbor+shrub,all shrub and all grass were analyzed and amounts of noise reduction function and value were calculated to study ecological benefits.Results showed that effects of different greenbelt types on traffic noise reduction were different.Arbor+shrub was the best,and all grass was the worst.10-30 m of all kinds of greenbelt could reduce noise.Noise reduction function of greenbelts in Liuchang road was 77914.65 dB(A)/a,and total noise reduction value was 543065.10 yuan/a.Area of arbor+shrub type accounted for 55.41%of total area,and noise reduction value accounted for 67.75%of total value.