The amount of water a reservoir can hold varies widely and depends on its design, purpose, and location. Reservoirs can range from small, local ones holding thousands of acre-feet to massive ones with capacities measured in millions or even billions of acre-feet.
For example, smaller reservoirs may store enough water to meet the needs of a local community, while larger reservoirs, often associated with major rivers and dams, can hold vast quantities of water to supply multiple cities, support agriculture, or generate substantial hydroelectric power. The capacity of a reservoir is determined by factors such as the size of the watershed it serves and the intended use of the stored water, making it highly variable.
