| Title |
The Estimation of Unit COD Discharge Rate from Non - point Source by the BOX Model in Kwangyang Bay Basin |
| Authors |
구자공 ; 김유리 ; 문형부 ; 이우범 ( Ja Kong Koo ; Yu Ri Kim ; Hyung Bu Mun ; Woo Bum Lee ) |
| Abstract |
Although Kwangyang bay (Chonnam, Korea) had a beautiful landscape, the inner bay had been polluted by the industrial wastewaters and domestic sewage since 1969 of industrialization. During two years from 1989, quality of sea water in the bay was surveyed and using the collected data, this study applied the Box model under the assumption that the water body was completely mixed in each Box. and performed the sensitivity analysis to estimate the effective loading for non-point sources. From summer to early fall, the water quality of the bay showed that the salinity was low and COD was over the environmental criteria. Because the calculated value by the Box model is well satisfied the measured value, it can be used for the predicition of water quality for salinity and COD at the Kwangyang bay. Result showed that the non-point COD unit loadings from farm dry field, paddy field for rice farming, silviculture area and the normal industrial and residential land in Kwangyang bay area are 31.04, 22.38, 4.15 and 383.64㎏ COD/ha-year respectively. |