Convert acre-foot/year [ac*ft/y] to acre-foot/hour [ac*ft/h] Online | Free flow Converter

t/Year [ac·ft/y]


Acre-foot per year [ac·ft/y] is a unit of volumetric flow rate commonly used in hydrology, water resource management, and irrigation planning. One acre-foot represents the volume of water required to cover one acre of land to a depth of one foot, which is approximately 1,233 cubic meters or 325,851 gallons. When expressed per year, ac·ft/y quantifies the total water volume delivered, used, or available over a 12-month period. This unit is particularly useful for managing large-scale water supplies, such as reservoirs, rivers, or agricultural irrigation systems, providing a standardized measure to estimate annual water availability and consumption. For example, an irrigation system supplying 500 ac·ft/y delivers enough water to cover 500 acres to a depth of one foot over a year. It is also used to plan municipal water supply, allocate water rights, and forecast long-term resource needs. Compared to daily or monthly flow units, acre-foot per year gives a macro-level perspective, suitable for long-term planning, resource management, and sustainability assessments. Using ac·ft/y enables engineers, hydrologists, and policymakers to monitor, manage, and optimize water resources, ensuring efficient allocation and conservation for agricultural, municipal, and industrial use.


Hour [ac·ft/h]


Acre-foot per hour [ac·ft/h] is a unit of volumetric flow rate commonly used in hydrology, irrigation, and water resource engineering. One acre-foot represents the volume of water needed to cover one acre of land to a depth of one foot, approximately 1,233 cubic meters or 325,851 gallons. When expressed per hour, ac·ft/h measures the water volume delivered, consumed, or flowing through a system within a single hour. This unit is particularly useful for managing high-capacity water distribution systems, including canals, reservoirs, and municipal or industrial supply networks, where monitoring short-term flow is essential. For example, a hydroelectric dam releasing 10 ac·ft/h discharges enough water to cover ten acres to a depth of one foot every hour, assisting operators in controlling water levels and power generation. It is also applied in flood control, irrigation scheduling, and industrial water use where precise flow rates are critical. Compared to ac·ft/d or ac·ft/y, acre-foot per hour provides finer temporal resolution, allowing for rapid adjustments and better system management. Using ac·ft/h enables engineers and water managers to monitor, regulate, and optimize water flow, ensuring efficiency, safety, and sustainability in diverse water resource applications.



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