# Depth of characteristic diameter of drying zone

This is the depth of the diameter around a source where the soil has dried out. The equation originates from the book 'Kabel und Leitungen für Starkstrom' by L. Heinhold, 5th edition 1999 (in German).

Symbol
$L_{dry}$
Unit
m
Formulae
$\left(L_{cm}-d_{psc}\right) \frac{{g_{dry}}^2+1}{{g_{dry}}^2-1}$
Related
$d_{psc}$
$g_{dry}$
$L_{cm}$