Filter Trench Design Option
In addition to the soakaway design functionality, the designer
may opt to design a filter trench.
A filter trench is essentially the same as a soakaway except
that a specified portion of the surface runoff is allowed
to discharge through an overflow pipe. In this way, surface
water from a site can be treated by infiltration through the
fill media prior to discharge to a watercourse and also removes
the need for total storage within a traditional soakaway.
The Filter Trench Options can be found in the Design Options
box. Here you can specify the percentage of the impermeable
area that you want to overflow to the watercourse. See below
for the Filter Trench Design Options...
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Visual Soakaway Design - Help