Study On Noise Reduction Characteristics In Fuzhou Urban Road And Green Belt

With the rapid development of public transportation in China,there are more and more private car owners.Traffic noise is one of the main sources of noise in cities.Roads are interspersed in residential areas,schools,commercial areas and other areas.For fuzhou plant research mainly concentrated in the highway noise reduction and to reduce the noise of park plant group the attenuation mechanism of noise and ignore the influence of urban main road noise on people,and which also more pure forest to study the noise attenuation effect is given priority to,for the main plant configuration mode in metropolitan in fuzhou for noise attenuation effect of this,there are few studies from the Angle of plant use,this experiment with acoustic landscape research methods to explore major cities of fuzhou gulou road,and the surrounding area environmental noise level,through the way of data visualization for residents and urban planning workers to provide a reference.In this experiment,84 sample points were selected from four different road types in Gulou district of fuzhou city.When the noise is measured,two sound level meters are mounted on a tripod 1.2m above the ground.The sound source of the line is being measured.The human body should be at least 50cm away from the receiver when measuring.In addition,5 sample points were selected in different sections of roads,and the greenbelt was divided along the road direction of "20m x width of greenbelt".The green belt was divided into three dimensional greenness measurement,tree height measurement,plant community configuration,peripheral land use and road composition.The following conclusions are drawn:1.The two sides of the main urban roads in Gulou district of fuzhou are equipped with plants.There are no 16 kinds of arbors,18 kinds of shrubs and 7 kinds of groundcover,a total of 41 kinds of plants.More than 1,460 species of plants are planted in fuzhou city,while only 2.8%of the plant diversity used in the urban main roads in Gulou district are planted.The attenuation of noise has no obvious relationship with the total amount of TGB,but it is significantly correlated with the three-dimensional green volume of the green belt which one is between driveway and bicycle lane.2.The road noise levels of 75.3%of the 81 effective observation points of the main urban roads in gulou district of fuzhou exceeded the environmental noise limits of China.According to the continuous equivalent sound level(A)observed in the buildings near the street after the attenuation of the test sample points,all the noise values in the category 1 acoustic environment functional area were above the standard,and the noise values in the category 2 acoustic environment functional area were above the standard by 97%.It is found that the attenuation noise of the first kind of acoustic environment function area is greater than that of the second type acoustic environment function area,and the noise level of mixed residential land is obviously higher than that of the first and second type residential land.The results showed that there was no significant difference in the noise after attenuation between class 1 and class 2 of the acoustic environment functional area.3.Through the correlation analysis of the noise attenuation and the form of the main road observation points in Gulou district,it is found that the noise attenuation and the form of road are related to each other,and the correlation analysis between the road composition factors and the attenuation is also made.The noise attenuation is positively correlated with the number of vehicle lanes and the number of green belts,and the noise attenuation is significantly correlated with the number of vehicle lanes,and the noise attenuation with the number of green lanes is extremely significant.There was no significant correlation between attenuation and the number of non-motorized lanes.The correlation between the noise attenuation and road composition(the number of motorized lanes,the number of non motorized lanes,the number of green belts)shows that the number of greening belts is greater than the number of non motorized lanes.4.There was no significant difference in the noise after attenuation of the surrounding land types(1/4).Land use type 3 the noise of public management and public service land after attenuation is still higher than that of other land use.There is no statistical difference between the four types of road surrounding land and noise attenuation,and it is considered that there is no significant difference in noise attenuation between the four different types of road surrounding land.