경안천 서하보 수저퇴적물 준설이 경기도 광주시 수질오염총량관리에 있어 추가적인 부하량 삭감수단으로써 타당한가? (Dredging Bottom Sediments of Seoha Weir at the Downstream of Kyongan Stream can be Used as a Feasible Pollutant Load Reduction Option in the Total Pollutant Load Management System of Kwangju City?)

서지정보

· 발행기관 : 한국물환경학회
· 수록지 정보 : 한국물환경학회지 / 27권 / 1호 / 19 ~ 29페이지
· 저자명 : 유승훈, 이범연, 이강현, 박신정, 이창희

초록

In order to assess the influences of bottom sediment on water quality, following measurement were made. (1) Estimations of pollutant loads from the bottom sediment based on mass balance concept, (2) measurements of pollutant concentrations in the sediment to assess the pollution level and influence potential, (3) in situ and laboratory measurements of Sediment Oxygen Demants (SOD) and pollutant load (sediment release) from bottom sediment. Analyses of inflow and outflow loadings using simple mass balance show that there are some variations found according to the pollutants. However, there is no consistent evidence that the sediment can be a source of pollutants. Pollutant concentrations in the sediment range 16~724.8 mg/kg (COD), 1.68~12.64 mg/kg (T-P), 5.6~76.8 mg/kg (T-N), 0.32~21.6 mg/kg (NH_3-N), 0.092~0.544 mg/kg (NO_2-N), 4.8~18.4 mg/kg (NO_3-N), and 1.59~11.23 mg/kg (PO_4-P). Measured SOD ranges 0.190~0.802 g･m^(-2)･d^(-1) and measured release rate ranges -1618.42~10 mg/m^2･d(COD), -12~16 mg/m^2･d(T-P), -197.37~140 mg/m^2･d(T-N), 0.4~74.32 mg/m^2･d(NH_3-N), -2.04~0.8 mg/m^2･d (NO_2-N), -70~40 mg/m^2･d (NO_3-N), and -26.11~28.55 mg/m^2･d(PO_4-P). All study results indicate that bottom sediments in the Seoha weir show only limited effects on the water quality. It implies that sediment dredging is not an effective option or management measure to reduce pollutant loading.

영어초록

In order to assess the influences of bottom sediment on water quality, following measurement were made. (1) Estimations of pollutant loads from the bottom sediment based on mass balance concept, (2) measurements of pollutant concentrations in the sediment to assess the pollution level and influence potential, (3) in situ and laboratory measurements of Sediment Oxygen Demants (SOD) and pollutant load (sediment release) from bottom sediment. Analyses of inflow and outflow loadings using simple mass balance show that there are some variations found according to the pollutants. However, there is no consistent evidence that the sediment can be a source of pollutants. Pollutant concentrations in the sediment range 16~724.8 mg/kg (COD), 1.68~12.64 mg/kg (T-P), 5.6~76.8 mg/kg (T-N), 0.32~21.6 mg/kg (NH_3-N), 0.092~0.544 mg/kg (NO_2-N), 4.8~18.4 mg/kg (NO_3-N), and 1.59~11.23 mg/kg (PO_4-P). Measured SOD ranges 0.190~0.802 g･m^(-2)･d^(-1) and measured release rate ranges -1618.42~10 mg/m^2･d(COD), -12~16 mg/m^2･d(T-P), -197.37~140 mg/m^2･d(T-N), 0.4~74.32 mg/m^2･d(NH_3-N), -2.04~0.8 mg/m^2･d (NO_2-N), -70~40 mg/m^2･d (NO_3-N), and -26.11~28.55 mg/m^2･d(PO_4-P). All study results indicate that bottom sediments in the Seoha weir show only limited effects on the water quality. It implies that sediment dredging is not an effective option or management measure to reduce pollutant loading.

참고자료

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