城市高层建筑大气颗粒物污染和噪声垂直分布特征

以空气颗粒物和噪声为研究对象,利用颗粒物监测仪和噪声仪,研究了颗粒物和噪声在不同天气状况下以及垂直方向上的变化规律,结果表明,(1)在0～56m之间,TSP、PM_(10)随高度增加而减小,56～116m之间随高度增加而增大.低空中的PM_(2.5)、PM_1相差不大,而100 m以上高空中的PM_(2.5)、PM_1污染程度明显大于地面.(2)天气条件影响颗粒物污染程度.晴天和大风天颗粒物的污染相对较轻,阴天时污染最重.(3)L_(eq(A))随高度增加而增大,最高点(116 m)处的噪声比地面高约4 dB.晴朗和阴天条件下,噪声差别不大;在大风天气条件下,高层建筑顶层的噪声污染较重.

On the vertical distribution of particle pollution and noise in high-rise buildings

The change of particle pollution and noise with weather condition and vertical height has been discussed using dust moni-toting instrument and AWA6218 noise statistic analysis instrument at high-rise building on Nongye Road, Zhengzhou City. The re-suits show as follows: (1) The concentration of TSP, PM_(10) decrease vertically from 0 to 56 meter height, but increase for 56 to 116 meter. The PM_(2.5) and PM_1 has no significant difference with concentration in lower altitude, but more polluting tends in higher alti-tude than near ground. (2) The weather condition has significant influence on the dust pollution. The concentration of PM_(2.5) and PM_1 in sunny days is relative lower than that in cloudy days. (3) The L_(eq(A)) increased gradually along with height with the highest value at 116 m 4 dB (A) higher than that near ground. The noise value was not significantly different from 0 to 116 meter no matter in sunny or cloudy days. The noise in the top of the building was more polluted than near ground, which is effected by strong wind.