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RFI - Attachment F - Engineering Report
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Evaluation of Gully Pit Inlet Litter Control Systems– Brisbane City Council and Gold Coast City Council
200
180
160
140
120
Depth at Invert (mm)
100
80
60
40
Standard pit
20
Tray basket insert
0
0 50 100 150 200 250 300 350 400
Approach Flow (L/s)
Figure 6: Sag results - tray basket.
3.4 Enviropod Testing
Hydraulic testing, including high chamber water level (CWL) pre-testing,
and pollution capture performance testing was carried out for the
Enviropod basket. Two basket (collection bag) types were assessed; a
coarse and a fine fabric.
Test results and observations:
During initial tests, plastic sheeting on both the front and back sides of
the basket failed when subjected to high flows (>100L/sec). The sides
were subsequently replaced with sheet metal.
Litter Capture Performance
On-grade
During the initial tests, all of the litter (10L) was captured with approach
flow set at 25L/sec. It was decided to increase the amount of litter until
bypass occurred. 30L of litter was collected (at 25L/sec) before bypass.
Urban Water Resources Centre 14 University of South Australia
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