freezing for periods longer than 10
more widely spaced, depending on the
Capacity of the pond is based
terrain and economy of construction.
on a 30-day storage period.
Where it is possible to construct the
volume of the pond above a 2-foot
ponds at different elevations, the
depth is considered when the total
flow from one to another should be
ponding area is 5 acres or less. When
over a wide and shallow weir to permit
the ponding area is larger, only the
maximum aeration and oxidation of the
Where topography permits, a
For best results, three
series of weirs, usually called a
or more ponds should be used in
cascade, is used to secure maximum
aeration (fig 9).