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The chemical composition of the waters of three Large rivers, the Kiso, Yahagi and Toyo in Aichi Prefecture, was surveyed for three years. The major chemical components of these three rivers were almost the same in kind and their concentration, and the seasonal variation was not so large. Moreover, the concentrations of the major components were scarcely different from those of about 25 years ago.In contrast, those of the trace components were found to have increased owing to man-made pollution. On the other hand, tritium content of the river waters was apparently different from that of the rain. Therefore, it can be concluded that the flux contribution from underground water to the river water is considerable.
- 日本陸水学会の論文
日本陸水学会 | 論文
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