| Title |
Effects of Coastal Environment by Discharge from the Sewage Treatment Plant |
| Authors |
신범식(Shin, Bumshick) ; 김규한(Kim, Kyu-Han) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.1.0127 |
| Keywords |
하수처리장;해안방류;하구폐색;부영양화;수치시뮬레이션 Sewage treatment plant;Coastal discharge;Estuary occlusion;Eutrophication;Numerical simulation |
| Abstract |
Most sewage treatment plants located offshore are discharged to the shore either directly or through rivers. Therefore, the water quality of the treated water discharged from the sewage treatment plant affects the water quality of the river water discharged to the river and the ocean. In this study, field surveys and numerical simulations were conducted to investigate the effect of treated water from the sewage treatment plant adjacent to the coastal environment. As a result of analyzing the water quality and sediment quality with the samples collected from the river and the estuary where the treated water was discharged to understand the impact on the coast, the treated water discharged from the sewage treatment plant was discharged to the river without exceeding the design criteria. However, the water quality discharged to the shore through estuaries was more contaminated than treated water. The cause of water quality deterioration of coastal effluent is due to the sedimentation of estuary temporarily by longshore sediment sransport which appeared around the estuary, the occurrence of estuary obstruction, and the increase of stagnant time in the estuary. As it was released and discharged, it was analyzed to affect the water quality, water quality and marine life around the estuary. Therefore, in the case of the east coast where the longshore sediment transport is strong, when planning the sewage treatment facility discharged to the ocean, it is necessary to closely examine the water quality change of the river water in the treated water such as the river mouth occlusion by the longshore sediment transport. |