Jellyfish Compliance with SEQ MUSIC Modelling Guidelines · MCU15/0122

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[OCR of page images]
Water Quality Objectives

The State Planning Policy for 2014 states the following water quality objectives are to be
achieved for applicable developments in Queensland.

Table B: Post construction phase—stormwater management design objectives

Application

(a) Applies to western Queensland and Cape York/ Far North Queensland, for population centres greater than 25,000 persons, and
(b) For all other climatic regions with population centres greater than 3000 persons.

 

Climatic Design objectives
eal] UT imeem LLL Ue TET Cer Ce Cd
east) unmitigated development (%) Application
itr)
Mapp
System)
South East 8 = Development for urban purposes within population
Queensland ” 45 9° centres greater than 3000 persons.
Central
Queensland 85 60 45 9a As above.
(south)
Central As above.
Queensland 75 60 40* ga * Mackay Regional Council has adopted a 35%
(north) reduction for TN.
As above.
Dry Tropics 80 60 * 40 90 * Townsville City Council has adopted a 65%
reduction for TP.
Wet Tropics 80 60 40 90 As above.
Development for urban purposes within
Cape York/ENQ | 80 bo ae oe population centres greater than 25,000 persons.
Western
Queensland 85 60 45 90 As above.
Excludes development that is less than 25%
impervious.

N/A N/A N/A N/A In lieu of modelling, the default bio-retention
treatment area to comply with load reduction
targets for all Queensland regions is 1.5% of
the contributing catchment area.

> All ¢ i L i

Catchments contributing to un-lined receiving
Waterway stability management waterway. Local government may not require

* Limit the peak 2-year ARI event discharge within Compliance if the waterway is degraded.

the receiving waterway to the pre-development For peak flow for the 1-year ARI event, use
peak 1-year ARI event discharge. co-located storages to attenuate site discharge
rate of stormwater.

Figure 4 - SPP 2014 Water Quality Objectives

Specifically for South East Queensland (SEQ), the water quality objectives are (from the table
above):

¢ 80% reduction in Total Suspended Solids (TSS)
© 60% reduction in Total Phosphorous (TP)

e 45% reduction in Total Nitrogen (TN)

e 90% reduction in Gross Pollutants (GP)

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