As a part of AAP 2018-19, the ground water flow modelling of 11,591 sq. km of Jaisalmer Block, Jaisalmer District was taken up in December-2018. The steady state and transient models were developed to evaluate the regional effects or changes in ground water resources associated with increased water demands and development. The model is developed and calibrated on the basis of hydrogeological data generated and collected during various previous studies, Aquifer Mapping Studies in Jaisalmer Block. Integrated hydrogeological, hydrological and geophysical data include the water levels of shallow and deeper zones along with the information of aquifers in terms of their depth ranges and thickness, lithological information and hydraulic properties. Objective of the study included; i. Understand the aquifer dynamics and to assess the ground water potential. ii. Design the predictive scenario of groundwater regime in case the present groundwater budget pattern continues. iii. Optimization of ground water development for sustainability of aquifers. and iv. Model the ground water flow system of Jaisalmer Block, with special emphasis on the fresh water artesian aquifers in saline areas.