Abstract
Abstract In order to know the net deposition of major chemical components by precipitaion in the Honshu Island of Japan, each event rain was sampled for one year in 1983 at two sites; Komoro City, an inland city and Tsukuba Science City, which was located in the Pacific side. Both sampling sites were at the similar latitude and rural area of similar populations. The concentrations of hydrogen ion, chloride, nitrate, sulfate, sodium, potassium, calcium and magnesium ions were determined in each rain and summarized in the monthly basis. The concentrations of hydrogen, sulfate and nitrate ions were several times higher at Tsukuba than at Koraoro. The average pH at Tsukuba and Komoro were 4.54 and 5.34, respectively, the former apparently influenced by the polluted air from the industrial area including Tokyo and the latter comparatively free from it. Some discussions were done for the identification of sources for each chemical component.
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