Abstract: The distribution of groundwater resources was very uneven，and the exploitation of groundwater resources was unreasonable in Nanjing City. In order to achieve the sustainable development and utilization of groundwater resources, the development and utilization division was researched. The structure of regional aquifer system was expressed by GMS software according to the hydrogeological conditions in Nanjing City. And the numerical simulation model was constructed to calculate the amount of groundwater resources with Visual MODFLOW, while the water balance method was also used. On the basis, the distribution characteristic of groundwater resources was analyzed quantitatively, and then a groundwater resources information system of Nanjing City was established on GIS platform, which is used to achieve the development and utilization division. Finally, the groundwater resources in Nanjing City were divided into three zones including developing and utilizing zone, potential zone of development and utilization and unsuitable exploiting zone.

Key words: Nanjing City, groundwater resources, distribution characteristic, development and utilization division