RFI - Attachment F - Engineering Report

Evaluation of Gully Pit Inlet Litter Control Systems– Brisbane City Council and Gold Coast City Council

                2. TEST SPECIFICATION AND PROCEDURE




                Test specification:


                •       Approach flows ranging from 0 – 320 L/sec.


                •       Channel longitudinal slopes:
                           -   1%, 4% and 12% (3 off)
                           -   “Sag” 0% slope for all configurations.


                •       Road pavement modelled to simulate asphaltic construction (hot-mix)
                        seal (Manning’s “n” = 0.014).


                •       Crossfall slope of 3.3%.


                •       Kerb type: Roll-top type kerb-and-channel currently set-up on Road
                        Rig.


                •       Lintel: Small (S) as per Gold Coast City Council (Drawing 59301).


                •       BCC perpendicular support bar grate


                Procedure:


                The test procedure involved:
                (i)        Add the pollution (10L) to an approach flow of 25 L/sec.
                (ii)       Observe and record the amount of pollution retained.
                (iii)      Increase approach flow and record capture flow.
                (iv)       Observe and record amount of pollution retained.


                These procedures were repeated several times during each test to assess
                the effect of increasing flows on litter and hydraulic capture performance.


                Urban Water Resources Centre               5             University of South Australia