water quality code

9.4.8 Water Quality and Drainage Code

9.4.8.1            Application
(1)   This code applies to assessable development identified as requiring assessment against the Water Quality and Drainage code
      by the tables of assessment in Part 5 (Tables of assessment).
(2)   All provisions in this code are assessment benchmarks for applicable assessable development


9.4.8.2            Purpose and overall outcomes
(1)   The purpose of the Water Quality and Drainage code is to ensure development is planned, designed, constructed and operated to
      manage wastewater, stormwater, groundwater and environmental flows and as part of an integrated water cycle in ways that
      protect environmental values, water quality and public health.
(2)   The overall outcomes sought for the Water quality and drainage code are:
      (a)    Waterways, wetlands, drainage lines, receiving environments and other ecologically important areas are protected and
             enhanced by managing the quality and quantity of stormwater runoff from development in accordance with best practice;
      (b)    Stormwater drainage systems are designed and constructed to effectively manage or convey stormwater in a way that
             protects people, property and the natural environment;
      (c)    Stormwater infrastructure and treatment systems are compatible with existing infrastructure and are designed and
             constructed to be cost effective across their design life;
      (d)    Stormwater design and management incorporates consideration of climate change impacts to ensure the intended
             function and capacity of the stormwater infrastructure and treatment systems are maintained over time;
      (e)    Stormwater infrastructure provides an appropriate level of flood immunity for roads based on desired standards of service
             identified for different flood hazard areas;
      (f)    Stormwater treatment systems are visually integrated into all development designs in a manner that incorporates natural
             features and habitats, as well as education opportunities to raise awareness of the connection of the development to its
             receiving waters;
      (g)    Stormwater treatment systems are multi­functional providing for stormwater conveyance, protection of ecologically important
             areas, passive recreation and erosion and sediment control;
      (h)    Hydrologic regimes are maintained to pre­development conditions to maintain waterway stability, protect ecology and
             groundwater dependent ecosystems, maintain suitable fish passage, and mitigate flood risk to people and property; and
      (i)    Development is designed, constructed and operated to facilitate erosion and drainage control and avoid release of
             prescribed water contaminants into receiving waters.

Table 9.4.8.3 ­ Criteria for assessment

Stormwater drainage design                 Table 9.4.8.3 Criteria for assessment (part)
Performance Outcomes                                                   Acceptable Outcomes

Stormwater drainage design
PO1                                                                    AO1
The development and its stormwater management system is                A stormwater management plan is prepared consistent
planned and designed having regard to:                                 with PSP6 Engineering Design Standards ­ Roads, drainage
(a)    the natural features of the site;                               and earthworks.
(b)    the need to avoid impacts and potential risks to ecologically
       important areas;
                                                                                    Able to Comply
(c)    the likely effectiveness of erosion and sediment control and
       stormwater drainage measures during rainfall events
       during and post construction; and
(d)    the need to protect environmental values and water quality
       of receiving waters both during and post construction.

PO2                                                                    AO2.1


                                              NOOSA PLAN 2020 ­ AMENDED AT 25 SEPTEMBER 2020                                     Page 1 of 7