基于污染物扩散的道路限界确定方法

基于排放模型 MOVES和道路扩散模型 CAL3QHC的有机结合，通过比选插值方法，实现了敏感点污染物浓度到全域污染物状况的分析，搭建了交通污染物排放扩散可视分析一体化体系，可开展道路周边污染物扩散全域分析.在该框架下，以中国珠海南湾大道为案例，对比分析了分流前后，南湾大道的重排路段所占比例减少了 13.64%，说明改变道路等级、增加分流道路的方式实现了排放的有效分散；确定分流方案后，对南湾大道分段进行排放讨论，发现 17、18路段排放最严重，确定了其道路限界，具体值为，横向最宽处 192 m，纵向最高处20 m.此外，以交叉口为对象进行扩散分析，综合不同污染物扩散范围后确定交叉口限界.

Method for Determining Road Boundaries Based on Pollutant Diffusion

Based on the combination of MOVES and road diffusion model CAL3QHC, the analysis of pollutant concentration from sensitive point to global pollutant condition is realized by comparison interpolation method, and an integrated platform framework for visual analysis of pollutant emission and diffusion is established, which can be used to carry out the global analysis of pollutants around road construction. Based on this framework, taking the Nanwan Avenue (located in Zhuhai Province of China) as a case, the proportion of high- emission sections on this Avenue decreased by 13.64% after the implementation of traffic diversion strategy. It shows that the way of changing road grades and increasing the number of traffic diversion routes achieves effective diffusion of traffic emissions. After determining the traffic diversion strategy, emissions on different Nanwan Avenue sections are discussed. It is found that emissions of the 17th and 18th sections are the most serious, and the limit value is 315 m at the widest point in the lateral direction and 19 m at the highest point in the longitudinal direction. In addition, the intersection is taken as the object of diffusion analysis, and the intersection boundaries are determined after synthesizing different pollutant diffusion ranges.