Introduction to Groundwater flow. Properties of aquifers: porosity, hydraulic conductivity, specific yield, specific storage, transmissivity. Basic assumptions, Darcy’s law, Solution of flow equations, Unsteady flow in aquifers (confined and unconfined). Regional groundwater flow, Transient flow in regional groundwater systems, Groundwater flow to wells. Soil moisture and groundwater recharge, Theory of unsaturated flow. Interaction of groundwater and surface water (lakes, wetland and rivers). Groundwater flow modeling techniques, simulation of two and three-dimensional groundwater systems. Numerical methods in groundwater flows (finite differences), different initial and boundary conditions, stability of scheme. MODFLOW- 2000 Description, Space and time discretization, External source and stress, Solver packages, Case study. Management of groundwater, Concepts of basin management. Conjunctive use of surface water and groundwater, optimal control groundwater management models, Case study.