ABSTRACT
The Water Company of Gelderland has considered to implement a system of artificial recharge with infiltration galleries to compensate the groundwater extraction to preserve the natural environment. A 3-D generic groundwater simulation model with an option for particle tracking analysis coupled with an optimisation procedure was used to design and optimise the infiltration-pumping system. Two systems of artificial recharge, the closed system and the parallel system, have been designed and analysed. The water level in and the size and length of galleries were varied to determine the required infiltration rate. The number, location and rate of pumping wells were optimally determined with the coupled simulation-optimisation model. The results shown that both systems can achieve the target infiltration and pumping rate while satisfying the two design criteria for drawdown and travel time.
