矢作川の水質特性

概要

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Long terms of changes for BOD, COD and SS from 1960 to 1988 in Yahagi River were figured by the calculation of the annual reports of water (Suisitsu Nenpyou) From the results of change on SS, the turbidity of Yahagi River was high level from 1960 to 1970, but low level, 10ppm, was recently shown The organic pollutions increased in the last five years The fluctuation of BOD showed a high variation, beside that of COD showed a low variation in Yahagi River In the short term experiment, for example, diurnal variation was observed in this river From the result of both the total nitrogen and phosphate showed the high value DON value of diurnal variations was observed the abundant from the sunrise, and DOP value was high at the midnight Dissolved oxygen value decreased from the sunset under the influence of the tributary (Kanori River) which was high pollutant river The remarkable changes of nitrogen and phosphate were observed with time from the inorganic and organic forms in Yahagi River It might be that the dissolved organic nitrogen and phosphate played an important part for the eutrophication from our observations and experiments in this River
名古屋女子大学の論文
1992-03-05