<p>By using of WATER GEMS V:8i Software to make a simulation model of water supply network, and input data of Bandar Abbas GIS maps, and with considering proper executive and economic points to change many subordinate pipes, diameter till more than 300 mm to main network and to add many new branch to main network in midtown with high aggregation, and output proper calibration according to fact, the city was possessed a virtual standard water supply network (skeleton)</p> <p>&nbsp;</p>