Ground conductivity
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Ground conductivity refers to the electrical conductivity of the subsurface of the earth.
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[edit] Radio propagation
Main article: Radio propagation
Ground conductivity is an extremely important factor in determining the field strength and propagation of surface wave (ground wave) radio transmissions. Low frequency (30-300 kHz) and medium frequency (300-3000 kHz) radio transmissions are particularly reliant on good ground conductivity as their primary propagation is by surface wave.
[edit] Other uses
Ground conductivity is sometimes used in determining the efficiency of a septic tank, using electromagnetic induction, so that contaminants do not reach the surface or nearby water supplies. [1]
[edit] References
- ^ Taylor, Rick; Lee, Doolittle (June 2003). "Ground conductivity survey of a septic system during and after failure". http://link.aip.org/link/?LEEDFF/22/555/1. Retrieved 2008-02-10.
[edit] External links
- Ground conductivity maps in the United States (provided by the Federal Communications Commission and includes large scale map)
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