Groundwater is an integrated part of water cycle. Most of the groundwater systems are connected with the surface-water system, and alteration of any system has impact on the other. This integrated surface and groundwater connectivity has significant water management and policy implications. For sustainable allocation of groundwater resource it is important to know how much water can be explored from the aquifer without disturbing the surface-water system. In addition, continuous pumping of groundwater, lowers the water table and increases the water movement both in the horizontal and vertical directions. This process makes an aquifer vulnerable to contamination and it is necessary to identify the aquifer properties and geometry which may affect the vulnerability.

For groundwater exploration and sustainable management, scientists and water mangers traditionally utilize conceptual and numerical models based on two dimensional (2-D) models using borehole data. Recently with the growing computing power, three dimensional (3-D) models are widely used in better decision making. In hydrogeology, 3-D subsurface modelling provides better understanding of the whole aquifer system regarding stratigraphy, geometry, volume etc. which are very necessary parameters for sustainable groundwater resource management. The interactive 3-D geological models provide a much better contextual environment to process, analyse and communicate the information than the 2-D model. 3-D visualisation and groundwater surface-water connectivity assessment of an aquifer is an integrated approach that could provide better information to the managers and to the policy makers for the sustainable management of water system.