| Symbol |
description |
Units |
| C |
concentration |
kg m-3 |
| Cv |
soil heat storage capacity |
J m-3 °C-1 |
| d |
diameter |
m or cm |
| D |
diffusivity (or diffusion coefficient) |
m2 s-1 |
| Ds |
diffusion coefficient, of solutes |
m2 s-1 |
| f |
porosity or total porosity |
m3 m-3 or cm3 cm-3 or % |
| fa |
porosity, air-filled |
m3 m-3 or cm3 cm-3 or % |
| fw |
porosity, water-filled |
m3 m-3 or cm3 cm-3 or % |
| H |
soil water potential, total |
KPa or m of water |
| hg |
soil water potential, gravimetric |
KPa or m of water |
| hm |
soil water potential, matric |
KPa or m of water |
| ho |
soil water potential, osmotic |
KPa or m of water |
| hp |
soil water potential, pressure |
KPa or m of water |
| J |
diffusion flux (Fick’s law) |
mg m-2 s-1 |
| K |
hydraulic conductivity |
m s-1 |
| Ks |
hydraulic conductivity, saturated |
m s-1 |
| M |
mass |
kg or g |
| Mg |
mass of gas |
negligible |
| Ml |
mass of liquid |
kg or g |
| Ms |
mass of solid |
kg or g |
| Mt |
mass, total |
kg or g |
| q |
flux density |
|
| qs |
flux, solutes |
kg m-2 s-1 |
| qw |
flux density, soil water |
m s-1 |
| R |
radius |
m or cm |
| T |
temperature |
°C |
| t |
time |
s |
| V |
volume |
m3 or cm3 |
| Vt |
volume, total |
m3 or cm3 |
| Vs |
volume of solids |
m3 or cm3 |
| Vl |
volume of liquid |
m3 or cm3 |
| Vg |
volume of gas |
m3 or cm3 |
| x |
distance |
m or cm |
| z |
depth |
m or cm |
| ρ |
density |
kg m-3 |
| ρb |
dry bulk density |
kg m-3 or g cm-3 |
| ρp |
particle density |
kg m-3 or g cm-3 |
| ρl |
density of liquid (soil water) |
kg m-3 or g cm-3 |
| θ |
soil water content |
% |
| θw |
gravimetric soil water content |
kg kg-1 or g g-1 |
| θv |
volumetric soil water content |
m3 m-3 or cm3 cm-3 |
| λ |
thermal conductivity |
J m-1 s-1 °C-1 |
