The flux of land-based source pollutants from Tumen River system entering the Sea of Japan

The influence of land-based source pollutants to marine ecological environment is principally in coastal or enclosed sea waters. Flux of land-based source pollutants into the sea will be effected due to social and economic development in the Tumen River basin. Pollutant type and primary pollution factor of the Tumen River in Northeast China is described by weighted coefficient method in this paper. The results indicate that the river is organic pollution type and primary pollution factor is COD. Fresh water fraction proves that the estuary is not affected by tide cycle. COD annual flux entering the Sea of Japan calculated by zero-dimension model in 1993 was 90.50 × 103 tons. It is estimated with emission coefficient method that the COD will be 176.4 × 103 and 458.6 ×3 tons for the years of 2000 and 2010 respectively.