This study was investigated the pollutant load, contamination properties, pollution condition of the fine parts of
tributary, the influence of Nakdong river watershed and etc. in the tributaries. The contaminated tributaries were that
among the Kumho and Nam river or were too far from site of water quality monitoring stations, regularly. As a result,
the water quality level was almost similar between Nam and Kumho River, except for certain parameter including
TN(Total Nitrogen), Chl-a(Chlorophyll-a) and SS(Suspended Solid) in which Kumho river were 20∼120%. The
point discharge load(kg/day) and load density (kg/day/km2) of tributaries were different the pollution level according
to the flow-rate (m3/sec) and stream influence area(km2), and the difference of these was observed highly at Nam
river. Specific contamination investigation of tributaries in Nam and Kumho river watershed was conducted from two
to nine points of the fine parts of tributaries depending on the confluence sites and shapes. This result observed high at
the Dalseocheon and Uriyeongcheon, respectively. Beside, the pollutant load contribution rate of Nakdong watershed
was high about 10% at the Dalseocheon and Uiryeongcheon. This was due to the differences of the environments
about the industrial complex, metropolis residence property, agricultural cultivation, livestock pen and the
downstream of non-point source.