FEFLOW provides a flexible environment to represent different kinds of  groundwater flow systems:

• 2D horizontal or cross-sectional projection, 3D representation
• Confined, partially confined or unconfined conditions
• Different ways of handling phreatic surfaces
• Boundary conditions of 1^st, 2^nd and 3^rd kind as well as specific well boundary condition including multilayer wells
• Physical constraints to boundary conditions
• Time-dependent material properties, boundary conditions and constraint
• Definition of selected parameters (e.g., groundwater recharge) by applying a user-defined equation
• Possibility to couple groundwater (FEFLOW) and surface water (MIKE 11) flow simulation