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Hydraulic head (red line) gradients actually cause groundwater to flow. Pressure head (blue line) is zero at the top of the column, as designated by the inverted triangle and horizontal lines (showing the water table). Elevation head (green line) always increases 1:1 with elevation.
In fluid dynamics, head is a concept that relates the energy in an incompressible fluid to the height of an equivalent static column of that fluid. From Bernoulli's principle, the total energy at a given point in a fluid is the kinetic energy associated with the speed of flow of the fluid, plus energy from static pressure in the fluid, plus energy from the height of the fluid relative to an ...
Hydraulic head (red line) gradients actually cause groundwater to flow (from high head to low head, down in this case). Pressure head (blue line) is zero at the top of the column, as designated by the inverted triangle and horizontal lines (showing the water table). Elevation head (green line) always increases 1:1 with elevation.
R h is the hydraulic radius (L; ft, m); S is the stream slope or hydraulic gradient, the linear hydraulic head loss loss (dimension of L/L, units of m/m or ft/ft); it is the same as the channel bed slope when the water depth is constant. (S = h f /L). k is a conversion factor between SI and English units.
Often only changes in hydraulic head through time are needed, so the constant elevation head term can be left out (Δh = Δψ). A record of hydraulic head through time at a well is a hydrograph or, the changes in hydraulic head recorded during the pumping of a well in a test are called drawdown.
Hydrostatic head is also used as a measure of the waterproofing of a fabric, commonly in clothing and equipment used for outdoor recreation.It is measured as a length (typically millimetres), representing the maximum height of a vertical column of water that could be placed on top of the fabric before water started seeping through the weave.
It takes energy to push a fluid through a pipe, and Antoine de Chézy discovered that the hydraulic head loss was proportional to the velocity squared. [5] Consequently, the Chézy formula relates hydraulic slope S (head loss per unit length) to the fluid velocity V and hydraulic radius R: = =
From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Hydraulic head#Hydraulic gradient; Retrieved from "https: ...