Crawl Space Fluid Dynamics  101.4...  & soil structure

ebb & flow  -   macropores & cracks   -    fluid migration     -    capillary action

'ebb & flow '- def. verb - the movement of water going in & out, the fluid action of a liquid moving through a porous substance back & forth

'capillary action'  - def. verb - waters ability to move through porous material via adhesion & cohesion, ex. water soaking upwards on paper

'fluid migration'  -  def. verb - the movement of water under the influence of gravity being pulled downward & inward into your crawl space