Equations

Relevant equations on and not on formula sheet

Void volume (V_v)

Total voids (volume & mass equations)

Porosity

void ratio

porosity/void ratio conversion

total porosity

effective porosity

volumetric water content

water saturation

converting between volumetric water content and water saturation

solid particle density

dry bulk density

density & porosity

hydraulic conductivity

total fluid potential

Pressure potential

Gravitational potential

Kinetic potential

Hubbert’s fluid potential

hydraulic head

hydraulic field calcs for h, z, ψ

hydraulic gradient

h1 = h high

h2 = h low

specific discharge

darcy’s law

intrinsic permeability

hydraulic conductivity

k = Cd² (intrinsic permeability)

open tube vs porous medium & porosity

average linear velocity

Travel time

Reynolds number

Hazen method

Schlichter method

Constant head permeameter

Falling-head permeameter

flow parallel to layering

flow perpendicular to layering

continuity at K boundary

Darcy’s law for flow nets

compressibility

compressibility of water

compressibility of solid grains

compressibility of aquifer matrix

Terzaghi principle

Specific storage - water expansion

Specific storage - matrix compression

Specific storage

storativity

volume released from storage