Pressure head

Pressure head

Potential energy of soil water due to the weight of water (hydrostatic pressure) on the point of interest. Pressure head is expressed as energy per weight and is equal to the height of water between the point of interest and the free water surface (water table), hp, also termed the piezometric head. Pressure potential is expressed as energy per unit volume and equals the piezometric head, Hp, the water density, ρ, and the gravitations constange, g (ρghp.

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Part of Speech: noun
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Industry/Domain: Earth science
Category: Soil science
Company: Soil Science Society of America
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Related terms

pressure head

Weather; Meteorology

Pressure in head units, for example, meters of fluid, equal to the force per unit area divided by the product of the density of the fluid and the acceleration due to gravity. It ...

pressure head

Earth science; Soil science

Potential energy of soil water due to the weight of water (hydrostatic pressure) on the point of interest. Pressure head is expressed as energy per weight and is equal to the ...

pressure head

Construction; Plumbing

Pressure in a plumbing system. The unit of measure which is the vertical force exerted by water at a depth of one foot.

pressure head

Engineering; Civil engineering

The amount of force or pressure created by a depth of one foot of water.

pressure head

Mining; General mining; Mineral mining

The height of a column of liquid supported, or capable of being supported, by the pressure at a point in the liquid.

capillary pressure head

Weather; Meteorology

The potential, expressed in units of water head, due to the capillarity of a porous medium in the presence of a wetted liquid.

swamp

Earth science; Soil science

Swamp is an area which is flooded or drenched with water and related to plunge or cause to sink.

semiarid

Earth science; Soil science

Fairly dry because of low rainfall. Semiarid regions, such as a prairie, usually have enough water for grasses and some bushes to grow.

talus

Earth science; Soil science

A sloping pile of small pieces of rock that is at the base of a cliff is called talus.

silt

Earth science; Soil science

Small grains or particles of broken down rock. Silt particles are smaller than grains of sand but larger than the particles in clay.

talc

Earth science; Soil science

A very soft, white or green mineral found in igneous and metamorphic rocks is called talc.

stone

Earth science; Soil science

A general term for rock, especially as used in construction. A hard clump of minerals that forms in a part of body.

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