배수갑문을 통해 부분 개방된 하구호에서의 순환과 수질모의

Abstract

To improve the water quality of the recently constructed Siwhaho, sluice gates were operated toalow fre exchange of water with the sea. This estuarine lake connected to the outer sea through narrow gates isaffected mainly by flushing by gate operation and river flows and wind forcing sometimes. As a predicting tolfor the water qualities, a three-dimensional finite volume model CE-QUAL-ICM is incorporated into a finiteelement hydrodynamic model, TIDE3D. In coupling these two diferent modules, a new eror minimizationtechnique is aplied by considering conservation of mass. Model tests for one year after calibration andvalidation using field observation show that eutrophication and other biological changes reach quasi-steady stateafter initial 60 days of simulation, thus it would be necessary to consider moderate ramp up option to removeinitial uncertainties due to cold start option. Sediment-water interaction might not be a concern in the long-termsimulation, since its effect is negligible. Simulated results show the newly applied scheme can be applied withsatisfaction not only for lessening of eutrophic processes in an estuarine lake but also loking for some activecirculation to improve water quality.