Ground resistivity

Is the property ground has to conduct electricity, also known as specific resistivity of the ground. To measure it, you get the average effect of the different levels of the ground, since this are often not uniform on its constitution, then we get "Aparent resistivity" or "Ground Resistivity".

On NOM-022-STPS-1999 resistivity is defined as the resistance to current per cubic meter of ground. according to NOM-008-SCFI-1993, the measure is expressed in Ohm-m, an international unit.

Resistivity varies across the globe, mainly affected by:

  • Soluble salts
  • Ground composition
  • Stratigraphy
  • Granulometrie
  • Higrometric state
  • Temperature
  • How compact is the ground