抄録
An investigation was tried to measure the affect of high concentration air pollution on boardleaf tree by means of spectral reflectance. The relationship between spectral reflectance and the amount of sulfur dioxide (SO2) deposited in leaves of the poplar tree were measured at the neigborhood of Tonghua city in China. An function was made by discriminant analysis for the relationship between the groups of SO2, deposited in leaves and vegetation indexes. The conclusions of this study are as follow.
The concentration of air pollution and amount of SO2, deposited in leaves of poplar decrease in accordance with the distance from atmosphere pollution source, and the vegetation indexes (RVI and NDVI) are in inverse proportion to the amount of SO2, deposited in leaves. In proportion to the amount of SO2, deposited on leaves of poplar, the reflectance at Red wavelength (400-700 nm) of the leaves becomes high, and the reflectance at Near-infraned wavelength (750-950 nm) of the leaves becomes low. The degree of amount of SO2, deposited in leaves can be estimated by the function of vegetation indexes of (RVI and NDVI), the formula is expressed as Y=0.595(RVI)+0.005(NDVI).
