Modeling of Groundwater Artificial Recharge by Reactivating an Old Stream Bed

This paper refers to the development and verification of a groundwater artificial recharge model in Xanthi plain, Thrace, Greece. The relative geological and hydrogeological research of the study area is described, as well as the artificial recharge application by reactivating an old stream bed of Kosynthos River, since 1994. The simulation of the aquifer system of the study area was achieved by the use of MODFLOW and involves both the model calibration and prediction of the aquifer system response. The verification of the 9-year-period model prediction for the first 7 years (1995–2001) proved successful, while the respective procedure for the last 2 years, 2002 and 2003, could not result in acceptable estimations.