| Title |
Estimation of TOC Concentration using BOD, COD in Runoff from Paddy Fields |
| Authors |
최동호 ( Dong Ho Choi ) ; 정재운 ( Jae Woon Jung ) ; 윤광식 ( Kwang Sik Yoon ) ; 이경숙 ( Kyoung Sook Lee ) ; 최우정 ( Woo Jung Choi ) ; 임상선 ( Sang Sun Lim ) ; 박하나 ( Ha Na Park ) ; 임병진 ( Byung Jin Yim ) ; 황태희 ( Tae Hee Hwang ) |
| Keywords |
BOD; COD; TMDL; TOC; Regression equation |
| Abstract |
BOD and COD are currently used for water quality indices, but adoption of TOC for TMDL (Total Maximum Daily Load) is being suggested. Estimation of TOC using existing BOD and COD data is very important to diagnosis water quality trend when TOC is used for water quality index of organic matter in the future. The relationships between BOD COD and TOC in runoff from paddy fields were investigated during 2008-2011. The observed mean concentration of EMCs (Event Mean Concentration) for BOD, COD, TOC were 3.87, 10.97, 7.26 mg/L respectively. The correlation coefficients between BOD-TOC and COD-TOC were 0.42, 0.73, respectively. The coefficient of determination of regression equation for BOD-TOC and COD-TOC were 0.18, 0.53 respectively. Even though, conversion of COD data to TOC seems to be rather reliable than that of BOD-TOC, further monitoring is recommended to ensure better interpretation of relationship among BOD, COD and TOC. |