南京市建筑施工环境噪声的管理与对策

针对建筑施工环境噪声扰民问题投诉居高不下，提出环境监理部门要积极宣传环保法律法规，规范举报工作，认真受理投诉，以取得市民的理解与支持；严格审批夜间建筑施工，加大监管力度，做好对夜间施工现场的核查；加强行风建设，通过内强素质，提高自身的业务水平，监督与服务并重；拓展工作思路，加强与建工、公安、市容、市政供电等部门的合作，共同解决噪声扰民问题。     

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.     

4类噪声标准适用区最佳监测时间研究

以1年的实测数据为分析样本,分别采用误差理论分析及数理统计分析方法,在保证一定精确度前提下确定出反映4类标准适用区噪声水平的最佳监测时间。     

噪声监测中存在问题的探讨

阐述了噪声监测中存在的问题，对监测点位的科学设置、测量时间和监测仪器的合理安排、如何正确地把握评估标准等作了探讨。     

厂界噪声测量中若干问题探讨

在工业企业厂界噪声测量中经常遇到的问题主要有监测点位布设和背景噪声扣除两类,并对敏感点距声源距离与布点监测、背景噪声的测量和受外来声源严重影响时如何测量厂界噪声等问题提出了解决办法.     

夜间建筑施工噪声扰民监测方法探讨

以一家夜间施工工地为例 ,通过对现有夜间建筑施工噪声测量方法及国家和深圳经济特区有关噪声污染定义的分析 ,阐述了夜间施工工地噪声扰民监测方法     

Application of CFD Methods for Modelling in Air Pollution Problems: Possibilities and Gaps

Different urban air pollution problems deal with complex structure of air flows and turbulence. For such problems the Computer Fluid Dynamics (CFD) methods become widely used. However, this approach despite a number of advantages has some problems. Experience of use of CFD tools for development of models and suggestions of their applications for a local scale air pollution over a complex terrain and stable stratification are discussed in this paper, including: Topography and complex geometry: choose of the co-ordinate system and computer grid; Turbulence closure for air pollution modelling: modified k- model for stable stratified ABL; Boundary conditions for vertical profiles of velocity for stable-stratified atmosphere; Effects of the radiation and thermal budget of inclined surfaces to dispersion of pollutants; Artificial sources of air dynamics and circulation.Some examples of CFD applications for air pollution modelling for a flat terrain, mountainous area, mining open cast and indoor ventilation are discussed. Modified k- model for stably-stratified ABL is suggested. Due to the isotropic character of the k- model a combination of it in vertical with the sub-grid turbulence closure in horizontal can be more suitable for ABL. An effective scheme of boundary conditions for velocity profiles, based on the developed similarity theory for stable-stratified ABL, is suggested. Alongside with the common studies of atmospheric dispersion, the CFD methods have also demonstrated a good potential for studying anthropogenic and artificial-ventilation sources of air dynamic and circulation in local-scale processes of air pollution.     

Pearce型构造岩浆地球化学判别图评述——以玄武岩为例

自从六十年代板块构造的概念诞生以来,人们认识到有必要探讨古地理和古构造重建的方法.一段时期以来,很多学者(如Gilluly,1971)认为,岩浆作用与特定的大地构造环境紧密相关,不同的岩浆类型或火山岩系列产在一定的地壳环境,因而出现了许多运用主要或微量元素资料的分类体系或判别图.基于Irvine和Barager(1971)以及Miyashiro(1973)发表的主要元素图解能用来判别岩浆类型,而Pearce(1976)则介绍     

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。     

商丘至开封高速公路声屏障效果分析

随着高速公路的快速发展和车流量的日益增加，环境噪声给沿线居民带来一定影响。为了解商丘至开封堂速公路沿线声屏障的效果选取一所村办小学和一座村庄，监测了声屏障设施的效果，得出了该段起到噪声保护敏感点和降噪作用的结论，随后提出设置声屏障的若干建议。