Water shortage and quality have become two important challenges to Beijing since 1990s. The groundwater resources, as the dominant sources for domestic and agricultural use, are depleting due to abstraction and continuous drought in recent years with rapid urbanization and increasing water consumption. Therefore, understanding these local aquifer systems is fundamental for scenario analysis and future sustainable water resources management. In this paper, we present our work on numerical analysis of a 3D layered regional groundwater flow model for the Nankou area. The hydrogeological layers were reproduced properly with the sparsely distributed boreholes data. The numerical analysis was carried out by using the finite element method based on the software OpenGeoSys (OGS). The model calibration and sensitivity analysis were accomplished by inverse methods applying a model independent parameter estimation system (PEST). The results of the calibrated model show reasonable agreements with observed water levels and the transient groundwater flow simulations reflect the drawdown of last 9 years and show the depression cone formed in an intensive pumping area.
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