Abstract
Investigations were made during the period from June, 1971 to Jan., 1972 on the load of pollution into the marine area of Mikawa Bay from all rivers around the Bay with the following results.
1. Average total amount of river water entered into the Bay during the period was 290 m3/s and the total loads of pollution were 1.3kg E BOD/s, 2. 1kg E COD/s and 0.5kg E T-N/s.
2. Loads of pollution by rivers are scarcely influenced by the values of BOD, COD and T-N respectively, but are governed entirely by the quantities of river waters.
3. The loads of BOD of the large rivers, Toyokawa and Yahagi, amount to about 50% of the total one of all rivers.
