What is a dam primarily used for in water management?

A dam serves as a crucial barrier that spans across a river or stream, effectively regulating the flow of water. This primary function allows for several important applications in water management, including flood control, storage of water for irrigation, and hydroelectric power generation. By controlling the water flow, a dam prevents excessive flooding during heavy rains and ensures a stable water supply during dry spells. It also creates reservoirs, which can be used for drinking water, recreation, and aquatic habitat preservation. This multifaceted utility underscores the importance of dams in managing and directing water resources efficiently, thereby reinforcing their role as essential structures in water management systems.