초록

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It increases the need and importance of groundwater management and control in groundwater dependent ecosystems (GDEs). This paper presents the optimal design of contaminated groundwater control in GDEs using a simulation-optimization technique. For the simulation-optimization technique, MODFLOW and ...

It increases the need and importance of groundwater management and control in groundwater dependent ecosystems (GDEs). This paper presents the optimal design of contaminated groundwater control in GDEs using a simulation-optimization technique. For the simulation-optimization technique, MODFLOW and MT3D were used for simulating groundwater flow and mass transport and genetic algorithm (GA) was used for optimization. Numerical experiments were performed to obtain optimized total pumping rates and injection rates for hydraulic contaminant systems to control movement of contaminated groundwater to adjacent river or stream in a hypothetical aquifer. Results show that optimized total pumping rate is similar to optimized injection rate, which satisfies both hydraulic balance in the system and pumping constraint. Optimized total injection rate is estimated to be a little larger than optimized pumping rate so that injected water can prevent contaminated groundwater from moving towards river. Simulation results show that optimized hydraulic containment system successfully control contaminated groundwater movement and remediate contaminated groundwater within the period of application (=one year). This work is a preliminary study to control and manage groundwater contamination in groundwater systems adjacent to rivers or streams, thus provide a basic implication for groundwater contamination management in GDEs

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