Download PONDS Version 2.26 Users Manual.

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PONDS USER MANUAL
4.
Compute the vertical height of the water table mound above the center of the
underdrain pipe (parameter "m" in feet)
Note that the diameter of the drain pipe is input in inches and is converted to feet
in the above equation as is the thickness of the gravel envelope.
5.
Compute underdrain spacing (S) using the ellipse equation (units will be in feet)
6.
Compute total length of laterals (L) required
7.
Compute cumulative flow rate from the theoretical length of laterals (i.e., the flow
rate through the pond outfall pipe from underdrain system)
8.
Compute flow rate per lineal foot of lateral
August 7, 1995