Design Procedure
There are four basic steps in the design procedure for Visual
Soakaway Design 4.
- Carry out a site investigation to determine the soil infiltration
rate.
- Establish your design variables. ie Surface area, rainfall
depth, soil infiltration rate, storm duration.
- Offer an initial size for the trench soakaway by filling
in the dimension boxes in the "Trench Soakaway".
- The program will then produce a visual representation
of your soakaway, either the in trench or ring form (depending
on which tab you are currently in). The visual soakaway
may now be moved and stretched to size and will auto-design
in real time.
When reviewing your design always remember to check the Design
Options window. The size of the soakaway can change drastically
depending on which options are selected.
Further features included in the program include...
No allowance is made for the time taken for run-off to discharge
to the soakaway, the required storage volume is calculated
on the basis of instantaneous discharge to the soakaway.
The outflow from the soakaway is under-estimated; higher
infiltration rates occur at greater depths of storage in practice
than are adopted in design, and because the outflow is calculated
on the basis of the rainfall duration rather than the run-off
duration. The latter may be considerably longer, depending
on the length of drains.
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Visual Soakaway Design - Help