Abstract
The diffusion state of SO2 in the atmosphere have been evaluated by digital simulation method using the Air Diffusion Model. However, it is a few possibility to find the affected site at with low (high) SO2 concentration by only using the Air Diffusion Model as existing method. In this case, from several findings by our past researching, it can be solved by using the growing index vegetation which shows obvious reaction against SO2 concentration change.
Comparing with the vegetation which normally growing condition, it is shown a tendency that the spectrum of the vegetation with bad growing condition rises at the visible red band (R) and falls at the near infrared band (NIR). If evaluating the vegetation condition grown at the SO2 polluted area by the reflectance characteristics (NIR/R) as an index, the affected site can be distinguished between low concentration site and high concentration site.
In this study, it is proposed the making process for the SO2 distribution map and the evaluation method of the air polluted condition around urban area by using that map, and also reported the verified results of the analyzing accuracy by mentioned method for the real urban area.
