Chemical Quality of River Waters of Japan.
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概要
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The chemical analyses of the water of ca. 300 Japanese rivers show that these rivers are characterized by the paucity of salts especially in calcium carbonate and by generally rather rich in silicate. The chemical constituents of the water of 27 selected rivers are shown in the accompanying diagram, in comparison with the average data of the world rivers adapted from Clark's Data of Geochemistry. The possible quantities of nutritive salts to be supplied by river waters for irrigation are calculated. It becomes evident that the quantities of potassium, silicate and calcium in river waters seem to be suficient to supply to rice-fields as the source of nutrients.
- 日本陸水学会の論文
日本陸水学会 | 論文
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