The short course starting from June 27th to 28th covers the development of integrated hydrologic models using HydroGeoSphere (HGS). The HGS model is a three-dimensional groundwater-surface water flow and contaminant transport model and has been used in various fields from hydrologic studies to engineering applications. Participants will learn how to apply HGS to their own research or industrial projects through a combination of presentations and hand-on practices. The topics covered include: theoretical background of groundwater-surface water flow and contaminant transport (mathematical formulation and numerical approaches); hands-on simulation exercises (data preparation, mesh generation, HGS operation, calibration, visualization, and result interpretation); cost-effective computing skills (parallel computing utilities, characteristics of nonlinear problems, and effective mesh generation).