Presenter/Author Information

Chansung Oh, Rural Research Institute

Keywords

Saemangeum Reservoir, Management measure, Vulnerability zone, EFDC, Water quality

Start Date

17-9-2020 8:20 AM

End Date

17-9-2020 8:40 AM

Abstract

The numerical simulation studies on temporal changes in water quality at Saemangeum Reservoir have been continuously conducted by applying various discharge and pollutant loads from Saemangeum Watershed. The sustainable management measures to maintain appropriate water quality are required because the point and non-point source pollutions are transported, and can have a directly adverse effect on water quality. The final goal of Saemangeum reclamation project is to convert the Saemangeum reservoir into fresh water by 2020, while the final judgement of 2nd Saemangeum Water Quality Improvement Measures is underway. The objectives of this study are to simulate three-dimensional hydrodynamics and water quality systems, separate vulnerability zones associated with water quality, and suggest the management plan for each zone under Saemangeum freshening reservoir condition. To achieve this objectives, EFDC (Environment Fluid Dynamics Code) model is calibrated with observed water quality data first, and water flow direction, water quality (DO, TN, TP) and stratification coefficients are predicted and analyzed. The numerical simulation results show that it is necessary resolving water body stagnation, dredging the sediments from sedimentary layers, deposition of nutrients through alum precipitation, reducing of inflow pollution concentration, and circulation of organic-inorganic matters for improving water quality.

Stream and Session

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COinS
 
Sep 17th, 8:20 AM Sep 17th, 8:40 AM

Suggestions on Management Measures for Water Quality Vulnerable Zones using EFDC Model

The numerical simulation studies on temporal changes in water quality at Saemangeum Reservoir have been continuously conducted by applying various discharge and pollutant loads from Saemangeum Watershed. The sustainable management measures to maintain appropriate water quality are required because the point and non-point source pollutions are transported, and can have a directly adverse effect on water quality. The final goal of Saemangeum reclamation project is to convert the Saemangeum reservoir into fresh water by 2020, while the final judgement of 2nd Saemangeum Water Quality Improvement Measures is underway. The objectives of this study are to simulate three-dimensional hydrodynamics and water quality systems, separate vulnerability zones associated with water quality, and suggest the management plan for each zone under Saemangeum freshening reservoir condition. To achieve this objectives, EFDC (Environment Fluid Dynamics Code) model is calibrated with observed water quality data first, and water flow direction, water quality (DO, TN, TP) and stratification coefficients are predicted and analyzed. The numerical simulation results show that it is necessary resolving water body stagnation, dredging the sediments from sedimentary layers, deposition of nutrients through alum precipitation, reducing of inflow pollution concentration, and circulation of organic-inorganic matters for improving water quality.