This study aims to develop an integrated solution that mitigates the adverse impacts of flash floods while capturing excess runoff to recharge groundwater aquifer. A case study was conducted in Tenth of Ramadan City, Egypt. The research approach combined field-based monitoring of groundwater levels through observation wells and automated loggers with advanced hydrological modeling. Watershed delineation was performed using WMS, and subsurface flow were simulated using MODFLOW. Modeling results for a flood event with a 100-year return period estimated a total runoff volume of approximately 8 million cubic meters. Subsequent recharge led to a rise in groundwater levels, reaching a depth of 5.0 meters. Recharge, which involves infiltration of surplus surface water proved effective in reducing flood risk and enhancing groundwater reserves. The findings contribute to the growing extreme hydrological events, when effectively managed, can be transformed into strategic opportunities for sustainable water resource development under different climate change scenarios.