This lecture extends the previous discussion by focusing on the numerical solution of governing equations in groundwater modelling. It outlines the essential information needed for solving subsurface flow problems, including the governing equation, flow domain, boundary and initial conditions, aquifer parameters, and the mathematical methods of solution. Computer programs are utilized to solve these equations, with generic models being adapted to specific site conditions to create site-specific models. The lecture also covers the importance of calibration and verification to ensure model accuracy and emphasizes the role of sensitivity analysis in understanding parameter influence on model results. Finally, it highlights various groundwater modelling software tools and their applications, including MODFLOW and its derivatives.
