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A
diversion is a graded channel, constructed across the slope with a
ridge running along its lower side. It conveys water away from its
present source to another location.
Diversions often function like terraces. But whereas a terrace
is part of a larger system, a diversion often stands alone, serving
one specific purpose. Also, a diversion typically handles a greater
flow of water coming from a larger area than an individual terrace
does. Do not use diversions as a substitute for terraces.
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Diversions
have many uses of their own, such as: to divert water away from gullies,
farm buildings, feedlots, and bottomlands; to collect or direct water
to a pond; to break up concentrations of water on long, gentle slopes
and on slopes too irregular or flat for terraces; to protect a terrace
system by diverting water away from the uppermost terrace; and to
protect lowlands from flooding. |