Convert Acre-feet per hour to Cubic kilometres per year
Convert Acre-feet per hour (ac-ft/h) to Cubic kilometres per year (km³/yr) instantly and accurately.
Conversion Formula
km³/yr = ac-ft/h × 0.01081270179
About Acre-feet per hour
The acre-foot per hour (ac-ft/h) equals 1233.48183754752/3600 ≈ 0.34263 m³/s, standard for sizing irrigation district delivery canals, reservoir outflow scheduling, and aquifer recharge basin calculations in the western US. The US Bureau of Reclamation uses ac-ft/h for canal operational planning; a 1 000-acre farm irrigating with 0.5 in/h rain-equivalent receives ≈41 ac-ft/h. 1 ac-ft/h ≈ 0.34263 m³/s.
About Cubic kilometres per year
The cubic kilometre per year (km³/yr) equals 10⁹/(365.25×86400) ≈ 31.688 m³/s, the unit used in global hydrology, glaciology, and climate science for river basin runoff, ice-sheet mass balance, and groundwater storage change. Total global freshwater river runoff is ≈37 000 km³/yr; the Amazon alone contributes ≈6 600 km³/yr; the Greenland ice sheet loses ≈280 km³/yr to melt and calving. 1 km³/yr ≈ 31.69 m³/s.
Quick Reference Table
| Acre-feet per hour (ac-ft/h) | Cubic kilometres per year (km³/yr) |
|---|---|
| 1 ac-ft/h | 0.0108127 km³/yr |
| 2 ac-ft/h | 0.0216254 km³/yr |
| 5 ac-ft/h | 0.0540635 km³/yr |
| 10 ac-ft/h | 0.108127 km³/yr |
| 25 ac-ft/h | 0.270318 km³/yr |
| 50 ac-ft/h | 0.540635 km³/yr |
| 100 ac-ft/h | 1.08127 km³/yr |