Storm Water management plan · MCU12/0133.03

Noosa Council documents


                  Bligh Tanner Consulting Engineers                                                                              Page 5
                  Noosa Flexi Learning Centre Stormwater Management Plan
                  August 2012




                  2 DESIGN OBJECTIVES
                  This chapter outlines the relevant stormwater management design objectives for site.


                  2.1 Stormwater Treatment Objectives
                  Stormwater quality is to be managed in accordance with the Noosa Plan Water Sensitive
                  Urban Design Code (Table 14-61).

                  Table 3 How the proposal responds to the Noosa Plan
                  Specific Outcome                       Probable Solutions                   Proposed Approach
                  Water reuse                            S1.1 Development complies            Minimise ground-level
                  O1 Development uses a                  with the water quality standards     impervious areas (i.e. slab on
                  combination of detention and           in Table 2 of the SEQ Regional       ground construction) to less
                  retention systems to capture           Plan Implementation Guideline        than 25% of the site area.
                  run-off from areas on the site;        No. 7 for Water Sensitive Urban
                  AND                                    Design;                              Capture and manage the first 10
                  O2 Water storage devices must          S2.1 No solution provided            mm of runoff from impervious
                  have sufficient capacity having        S3.1 Captured water is plumbed       areas, including:
                  regard to local rainfall pattern       to be available for all external     • capturing roofwater for non-
                  and the catchment area of roof         uses including gardening,               potable uses
                  or other hard standing surface;        irrigation, ponds, filling           • infiltrating excess water into
                  AND                                    swimming pools and outdoor
                  O3 Captured water is utilised for      cleaning, as well as all ground         the soils to preserve the
                  all non-potable uses on site;          floor toilet cisterns and washing       regional hydrology.
                  AND                                    machine cold taps;
                  O4 On-site detention does not          S3.2 Where the captured water
                  adversely impact on water              is used for toilet flushing and/or
                  requirements downstream of the         laundry use, an automatic or
                  site where the water is required       manual interchange device that
                  to sustain the ecology and             allows alternate use of captured
                  hydrology of downstream                water or the reticulated water
                  systems (environmental flows);         supply is installed to ensure that
                  AND                                    there is a continual supply of
                  O5 Within the Shire Business           water for sanitary flushing and
                  Centre site, as shown on Map           laundry use.
                  SBC, on-site detention                 S4.1 No solution provided
                  measures are contained within          S5.1 No solution provided
                  the developed areas of the site,
                  clear of drainage lines and
                  Open Space Precincts.
                  Run-off treatment                      S6.1 & S7.1 Development              Capture and manage first 10
                  O6 Run-off that leaves the site        complies with the water quality      mm of runoff from impervious
                  is treated so as not to adversely      standards in Table 2 of the SEQ      surfaces as per Table 2 of the
                  impact on the ecology and              Regional Plan Implementation         SEQ Regional Plan
                  hydrology of downstream                Guideline No. 7 for Water            Implementation Guideline No. 7
                  environmental flows;                   Sensitive Urban Design.              for Water Sensitive Urban
                  AND                                                                         Design
                  O7 Within the Shire Business
                  Centre site, as shown on Map
                  SBC—
                  a) run-off treatment occurs
                  within the site ; and b) drainage
                  lines are only used for final
                  polishing of run-off.

                  Town water supply                      S8.1 A suitable backflow
                  connections                            prevention device is installed to
                  O8 Backflow devices or similar         protect the potable water within




                                                                                                             Print Date: 2 March 2020, 2:19 PM