Pore Water Pressure

`PWP = h_U *gamma_(Water)`

Enter a value for all fields

Pore Water Pressure (PWP) is the product of the uplift defined by the depth of the water table,`h_U`, and the specific weight (or unit weight) of water, `gamma_W`. Generally, PWP is a measure of the pressure of groundwater held within a soil or rock, in gaps between particles (pores), relative to atmospheric pressure. PWP is measured in piezometers (u).

In cases where there is no flow, the pore pressure at depth d below the water surface is: u = g_w d

Water Related Calculators

Plumbing Calculators

Rolling Offsets (Run and Travel) – The Rolling Offset Rolling Offset Lengths Pipe Grading function computes the run and travel length a rolling offset based on the offsets and fittings. (see diagram).
Diagonal of a Square - This is a simple calculation to assist in computing the diagonal of a square.
Diagonal of a Box - This computes the length of the diagonal of a box (T) based on sides of length R, S and U.
Flow Rate - This computes flow rate based on the total volume and the time it took to accumulate.
Pipe Flow Volume - This computes the total volume from a pipe based on the flow rated and the duration of flow.
Weight of Water in a Tank - Computes the weight of water in a cylindrical tank based on the radius and height (or length).
Weight of Water in a Pipe - Computes the weight of water or other substances in a pipe based on the dimension and material density.
Weight of Sea Water in pipe - Computes the weight of sea water in a cylinder based on the radius and height (or length)
Pressure Head - The Potential Gravity-Fed Water Pressure from a Tank (a.k.a. Pressure Head) based on the height of storage.
Pipe Volume - Computes the volume in a pipe
Pipe Surface Area - Computes the surface area of a pipe.
Pipe Coating Amount - Computes the volume of coating material for a pipe such as paint, polyethylene, polyurethane, zinc, bitumen, FBE or mortar.
Pipe Grading - Compute the drop needed over a run to maintain a grade (e.g., 4" over 12')
Volume of Water in a Tank (e.g. hot water tanks),
Volume of a Spherical Container
Weight of Water in a Spherical Container
Volume of Water in Rectangular Tank
Weight of Water in a Rectangular Tank
Capillary Rise - The height of water in a small tube due to capillary force.
Snow Water Equivalence - The volume of water created by an area and depth of snow.
Pore Water Pressure - Pressure of uplift from the water table.
Pipe Stress Budget - Computes the pressure that a pipe can withstand based on the allowable stress, wall thickness and outside diameter.