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The northeastern part of Greater Cairo is a target for development and anthropogenic activities that stress both the quantitative and qualitative aspects of the groundwater resources. On the other hand, it is a critical area, being adjacent to the Second Egyptian Research Reactor.An annual increase in groundwater levels (0.206 m/year) was estimated by earlier work of Al Gamal, 2011. This represents a crucial problem in the study area where it may influence the environmental and population safety due to the nuclear installation under the effects of potential radiological release. The main aim of this research is to provide an additional insight into the behavior of the groundwater flow system in the study area, and to provide valuable information for the decision-maker to the exploration of alternative management approaches.The main aim of this research is to provide an additional insight into the behavior of the groundwater flow system in the study area. and to provide valuable information for the decision-maker to the exploration of alternative management approaches.The groundwater model MODFLOW has been used as a simulator for groundwater flow both in steady and unsteady state to provide a solution for the problem of expected groundwater increment . The simulated groundwater flow system has been calibrated and production scenarios have been proposed and tested as a solution of the expected groundwater storage increase. One of these scenarios gave accepted results, by using eight production wells withdrawing this water to face such rise of the groundwater level, and using of this water in reclamation of the desert area around the nuclear facility.

Using Modflow as a Mangment tool for the Groundwater System in the Area Northeastern Cairo, Egypt