How does the Aswan High Dam control the Nile River's floods?

The Aswan High Dam controls the Nile River's floods by impounding the water within a massive reservoir known as Lake Nasser.1

By capturing these floodwaters, the dam allows human operators to regulate the flow of the river, releasing water only when it is needed for irrigation or other purposes. This process effectively places the annual Nile flood under human control for the first time in history.1

While this management provides significant benefits—such as reliable water for agriculture, improved navigation, and the generation of hydroelectric power—it also prevents the natural deposition of nutrient-rich silt on riverside farmlands, as the sediment is now trapped within the reservoir and canals.1