What is total head pressure head and elevation head?

The total hydraulic head of a fluid is composed of pressure head and elevation head. The pressure head is the equivalent gauge pressure of a column of water at the base of the piezometer, and the elevation head is the relative potential energy in terms of an elevation.

How do you calculate head pressure in soil?

The pressure head line can be completed by subtracting the elevation head line from the total head line. The pore water pressure at any point in the soil can now be found by multiplying the pressure head at that point by ρwg.

What is meant by the term pressure head?

In fluid mechanics, pressure head is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column on the base of its container. It may also be called static pressure head or simply static head (but not static head pressure).

What is total head in soil mechanics?

Total head consists of three components: elevation head, pressure head, and velocity head. As seepage velocity in soils is normally low, velocity head is ignored, and total head becomes equal to the piezometric head.

What is total head in fluid mechanics?

In fluid dynamics, total dynamic head (TDH) is the total equivalent height that a fluid is to be pumped, taking into account friction losses in the pipe. where: Static height is the maximum height reached by the pipe after the pump (also known as the discharge head).

What is head loss in soil mechanics?

When water flows through soils, from upstream to downstream, due to difference in water. level as in Fig. 7.1, some energy is lost in overcoming the resistance provided by the soils. This loss of energy, expressed as total head loss (hL), is simply the difference in water levels.

How is head elevation calculated?

Piezometric total head calculations in groundwater use the formula ​h=z+Ψ​ where ​h​ means total head or height of the groundwater level above the datum, usually sea level, while ​z​ represents the elevation head and ​Ψ​ represents the pressure head.

What is seepage pressure?

What is Seepage Pressure? When water flows through soil pores a viscous friction is exerted on it which causes transfer of energy between soil and water. This water pressure applied on soil which tends it to percolate is called as seepage pressure.