<報文>中央高速道路周辺の汚染解析

概要

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The authors were obtained an opportunity to examine the air pollution of the Chuo Expessway. The field was a residential section and measureing points were set to 200 in about 20 ha of this area. This investigation had an intention of clarifying the influence of the expressway from general city ways. In order to this, the following substances were measured, such as carbon monoxide, nitrogen oxides, hydrocarbons and their derivatives. The analysis of pollution was carried by means of two ways. One of them was the drawing the distribution map of carbon monoxide, from which the detail state of the auto exaust gas on the ground was accounted. Then, the ratios between two components were calculated. First, the ratio of NO₂/NO was considered to show the intluence from the high speed cars. Because, NO is oxidized to NO₂ in the gas bowl including exhaust gas and so the concentration ratio of NO₂ is correspond with the first NOx level and the carried time. Second, the ratio of NOx/CO was found higher according as high speed and counts of Diesel cars. Third, Concerning about hydrocarbons, the ratio (ethylene+acetylene+propylene)/ (hexane+toluene) is seemed to indicate the ratio of Diesel car to gasoline car. By means of above factors, the influence of expressway was able to be determined. These methods were found to be useful to the analysis of air pollution.
横浜国立大学の論文