Noise Attenuation Effect Of Plant Communities And Layout Of The Activity Space In Nature Reserve

With the rapid development of ecotourism in the Reserve, tourism activities in leisure and recreation activities to meet people while also protecting the ecological environment in the region had a negative impact, including noise pollution tourist route around the stakeholders gradually attracted attention, plants forest formation noise attenuation can play a good role.But different types of forest play noise attenuation is different. Therefore, by studying the different types of forest under different seasonal conditions on noise attenuation can plan for the future construction of the northeastern region of forest ecological experimental zone, especially the relationship between space and plant layout planning plays a guiding effect. Based on the measured ambient noise, according to the white noise and the measured noise making noise making noise at different frequencies in different altitudes in3different forest types7respectively forest belt noise attenuation experiments and analysis of the data by sorting room, draw the following conclusions:(1)The efficacious noise attenuation belt width of30m and the noise value increases with forest belt width, the regression equation to reflect the value oh the relationship between belt width and noise attenuation:y=0.5614x+16.095, the coefficient of correlation:0.9962. The noise attenuation effect in the0-10m width of the belt is better than10-20m,20-30m width of the belt, and the value of noise attenuation is decrease with the more distant from the sound source.(2) The noise value increases with the visibility of the belt decrease, the regression equation to reflect the value oh the relationship between level of visibility and noise attenuation:y=-0.5539x+45.845, the coefficient of correlation:-0.8836. Level of visibility concerned with forest leaves and branches density, greater the density of branches and leaves, visibility of the belts and point sound source in the same plane is smaller, the sound waves generated by diffuse reflection, absorption and other effects is larger, thus play a greater effect of noise attenuation.(3) The noise attenuation value in the winter is accounted for only69.5%in the summer. The noise attenuation effect of the belt in the summer is better than winter.(4) Differences in white noise attenuation effect of different forests. In the summer, The noise attenuation effect of mixed coniferous forest is better than mixed coniferous with broadleaf forest, the noise attenuation effect of the mixed broadleaf forest better than mixed coniferous; In the winter, the noise attenuation effect of the mixed coniferous forest better than mixed broadleaf with coniferous forest and mixed broadleaf forest, the noise attenuation effect of the mixed coniferous forest is better than mixed broadleaf forest. The best noise attenuation effect is the mixed coniferous forest. In the summer, the noise attenuation effect of the broadleaf species is better than coniferous species; In the winter, the noise attenuation effect of the coniferous species is better than broadleaf species.(5) Each forest type belt there is a big difference in the effect of different frequency noise attenuation. Under the condition of summer, the forest belt for500-1000Hz frequency noise attenuation effect is better than others. Coniferous forest is better for2000-4000Hz high-frequency noise attenuation effects than others. Broadleaf forest is better for125-250Hz low-frequency noise attenuation effect than others.Under the condition of winter, Coniferous forest is better for each frequency noise attenuation effects than others.