(Almost) Everything I ever needed to know about soil water ... in a sponge
Models are representations of concepts, objects, or systems, some of which can be excellent teaching tools. A household sponge will be used to demonstrate several characteristics of the relations of soil and water.
dry sponge
 runoff wetting sponge
"Dry" Soils Infiltration and Runoff Wetting and Saturation
water held
 drainage bearing capacity
Water Holding Capacity Percolation and Drainage  Engineering and Bearing Capacity
Updated 06-28-2005. Copyright 2005. Clay Robinson, Ph.D., as to all resources: Materials may not be reproduced without Dr. Robinson's written consent. Students are prohibited from selling (or being paid for taking) notes or webpages during this course to or by any person or commercial firm without the express written permission of the developer of these pages.