Percent Void Space (%)

This option is available for both Elevation vs. Area and Elevation vs. Volume tables. The default value is 100%. The percent void represents the amount of real storage available at each elevation. For open ponds this value is 100%. This option is useful for situation where the pond storage area is filled with impervious material, such as stone or gravel. The percent void space represents the open pore areas that can store water.

Example: For 50% void space, only ½ of the calculated (or specified) total volume would be available as water storage.