Fayoum Governorate faces numerous water-related issues, including adjusting for water shortages and limiting the volume of drainage water effluents entering Qarun Lake. Fayoum Governorate now faces a water scarcity, which is anticipated to worsen over time. Currently, this water scarcity is offset by drainage reuse, which degrades water quality. Numerous activities can be taken to address these water-related concerns using a water resources management approach. These measures are divided into two categories: water resources (supply management) and properly managing current water resources (demand management). The paper examines the application of the WEAP model as a decision-making tool for water sector planning and management, as well as the most appropriate future initiatives. WEAP was used to simulate current conditions in 2017 and future scenario in 2050. WEAP results show a water shortage of 1.3 and 2.67 BCM (billion cubic meters annually) for the various simulated scenarios. Because Fayoum is a miniature of Egypt. This study offers ideas for enhancing Egypt's water resources system, considering both natural and water systems. This study can serve as recommendations for improving Fayoum's water resources system.