This department is responsible for the design, study, and supervision of multipurpose dams used for electricity generation, water supply, and irrigation. It also covers the planning and implementation of irrigation and drainage systems, which are critical for improving agricultural productivity and water resource management. The department undertakes hydraulic studies, designs flood control structures such as Sabo works, and integrates disaster mitigation solutions into its projects. In collaboration with other sectors, it provides expert guidance and supervision on the development of efficient, eco-friendly, and resilient water management infrastructures.