Pascal first qualitatively observed these effects in the 17th century, and they were more rigorously described by the soil physicist Edgar Buckingham (working for the United States Department of Agriculture (USDA)) using air flow models in 1907.
head | head of state | Beavis and Butt-head | Alec Head | Murray Head | Head Start | Anthony Head | Head Start Program | Diamond Head | Human head | Head teacher | Machine Head (band) | Machine Head | Head Over Heels | Head of the River Race | Eddie the Head | Hilton Head Island, South Carolina | Edith Head | Diamond Head (band) | Beachy Head | The Bodley Head | Lizard Head | Head & Shoulders | Head over Heels (Paula Abdul album) | Head over Heels | Diamond Head, Hawaii | Women's Head of the River Race | Turk's head knot | The Top of His Head | Roy Head |
Allai Khwar Hydropower Plant is a run-of-the-river, high head project of 687 metres, located in the Battagram District on the Allai Khwar River, a left bank tributary of Indus River in NWFP Province.
Within EPANET, pumps are modeled using a head-flow curve, which defines the relationship between hydraulic head imparted to the system by the pump and flow conveyed by the pump.