Study on the effect of porous fence on air quality and traffic noise level around a double-decked road structure

Fence for traffic noise control sometimes causes adverse effect on air pollution. Thus in this study, performance of porous fence as a tool for control of both air pollution and noise pollution was evaluated. A two-dimensional numerical model for flow and pollutant concentration and an analytical model for traffic noise were utilized in the analysis of a double-decked road structure with fences only at ground (Case 1) and at both ground and upper deck (Case 2). Porous fences were assumed only at the ground level since the solid fences at the upper deck usually leads to desirable result on air pollution. Effects of the variable porosity on air quality and noise level near road were evaluated. Obtained results showed: (1) flow pattern in leeward of fence was drastically changed at 40–50% porosity in Case 1 and 50% in Case 2. The porosity larger than 40% excluded presence of a circulation behind the fence. (2) Effect of porous fence on air pollution was different in Cases 1 and 2. In Case 1, the porous fence generally resulted in the reduction of air pollution at the ground level; on the other hand, in Case 2, it rather led to increase of the concentration. (3) Traffic noise level was also largely changed by the porosity of the fence; an example of simultaneous evaluation of the effects of porous fence on both air and noise pollution in Case 1 showed that the fence of 60% porosity leads to reduction of air pollution by 20% compared with solid fence case, and reduction of noise pollution by 4–6% in dB compared with no fence case, at l m high and 10 m from the road.     

乌兰浩特市道路交通噪声污染现状及其控制措施

本文通过对乌兰浩特市道路交通噪声污染现状的调查，分析了造成交通噪声污染的各种因素。提出了若干防治措施和建议。     

Mapping of Noise by Using Gis in ŞAnliurfa

Traffic noise results from highways where the most important source of noise in cities. This noise has the properties of linear source. Constitution of noise maps has become compulsory to see the regions that are influenced from the noise, and to put forward the future environmental approaches. During the mapping of the noise, generally two fundamental problems are encountered, excessive time requirement for the measurement of noise and determining the method for the constitution of maps.This study was conducted in Sanliurfa city of Turkey, in 3×4 km area. Continuous weekly data were obtained in 11 measurement points. By using these data in (GIS) environment, preparation of the most reliable map in the shortest time is achieved by the interpolation method.     

住宅遭受交通噪声污染时开发商应承担的民事责任初探

从分析住宅遭受交通噪声污染时开发商民事责任的性质入手,探讨了现行声环境质量标准对开发商的适用性和合理性,阐明了开发商的责任范围,提出了完善住宅声环境质量标准的建议。主要结论：目前我国尚缺乏合理的约束开发商的住宅声环境质量标准;开发商的隔声减噪义务主要包括留出与道路之间的防噪距离和采取安装隔声窗、封闭阳台等隔声措施;应将门窗封闭状态下的室内噪声限值颁布为住宅声环境质量标准。     

"九五"期间乌鲁木齐市交通噪声的控制措施及效果

在分析交通噪声影响因素的基础上，对乌鲁木齐市近十年控制交通噪声污染的措施和效果进行了探讨。     

以淮安市为例研究中小城市噪声污染现状及趋势

收集2006-2010年淮安市各功能区环境噪声、交通噪声和区域环境噪声监测数据,分析中小城市环境噪声的污染状况,结果表明中小城市的噪声环境质量都有不同程度的好转,与大城市环境噪声比较,各类噪声都明显低于大城市的噪声污染,但随着城市和交通的改造与发展,第4类城市功能区夜间环境噪声有增加趋势。     

凯里市交通噪声污染状况分析及防治对策

依据"十一五"期间凯里市道路交通噪声监测统计数据,分析其交通噪声污染状况,讨论其交通噪声污染原因,并提出控制与降低交通噪声污染的对策。     

鄂尔多斯市城市道路交通噪声的现状分析及防治对策——以东胜区为例

通过分析鄂尔多斯市2007—2010年东胜区道路交通噪声污染现状，指出存在的主要问题，提出了相应的污染控制及防治措施，为有效改善城市道路交通噪声污染提供科学依据。     

曲靖市交通噪声现状及其治理

１９９６年，集中曲靖市７０％以上居民的一、二类混合区昼间等效声级超标率达１００％，噪声源主要是交通噪声。要治理曲靖市交通噪声污染，应着重解决控制车流量、车距、车速、汽车喇叭，改善路面状况，全方位绿化，加强交通管制，合理进行城市规划等几个方面的问题。     

高速公路互通立交交通噪声预测研究——以昆明绕城高速公路为例

道路交通噪声污染在我国城市地区已很严重。高速公路互通立交运营期的交通噪声比较突出。对几个交通噪声的预测模型进行比较和选择,并以昆明绕城高速公路为例,预测和分析了其互通立交的交通噪声,为噪声污染防治提供了依据。