To provide local-scale predictions of water levels for small-scale basins, a detailed groundwater flow model will be employed to simulate local processes. The groundwater model BIGFLOW [110] will be applied to selected irrigated and non-irrigated watersheds in the region, driven by the seasonal forecasts, and constrained at its boundaries through coupling with WaterGAP3. Specifically, the groundwater flow model will encompass a domain that will correspond to 2×2 or 4×4 WaterGAP3 cells with a 100m spatial resolution. Therefore, the large-scale simulation results will serve as boundary and initial conditions for the detailed groundwater flow simulations. Historical in situ hydro-meteorological (precipitation, meteorological, streamflow, groundwater levels) and remote sensing data will be used to support model calibration and validation. This modeling framework has been used in past studies to facilitate well placement or optimal withdrawal pumping rates and schedules for irrigated areas under different management scenarios [111, 112], and for recharge rate estimation in arid regions [113, 114].