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Analysis of Specific Contaminated Status and Pollutant Loads Contribution Rate of the Tributaries in Gumho and Nam River Basin

금호강, 남강 중권역 지류·지천의 상세오염 현황 및 오염기여율 조사

Na, Seungmin;Kwon, Heongak;Kim, Gyeong Hoon;Shin, Dongseok;Im, Tae Hyo
나승민;권헌각;김경훈;신동석;임태효

  • Received : 2016.10.12
  • Accepted : 2016.10.18
  • Published : 2016.11.30

Abstract

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 ($kg/day/km^2$) of tributaries were different the pollution level according to the flow-rate ($m^3/sec$) and stream influence area($km^2$), 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.

Keywords

Contaminated tributary;Load density;Point pollutant load;Pollutant load contribution rate;Specific contamination investigation

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