2016-02-02 P&O Committee - Item 3 - Attachment 3 - Noosa River Environmental Values and Water Quality Objectives

Noosa River environmental values and water quality objectives




Table 2 Water quality objectives to protect aquatic ecosystem environmental value (refer to Plan
WQ1401 for location of waters)
                                                                                                 1-11
Water area/type      Management         Water quality objectives to protect aquatic ecosystem EV
  (refer Plan       intent (level of
   WQ1401)            protection)


MARINE AND
ESTUARINE
WATERS
                                                                                    th   th       th
Area NH1 –              Aquatic                  Maintain existing water quality (20 , 50 and 80 percentiles),
Noosa headland          ecosystem – high         habitat, biota, flow and riparian areas. (Refer to Appendix D in
waters                  ecological value         Queensland Water Quality Guidelines for details.)

                                                 Note: there is insufficient information available to establish current
                                                 water quality for these waters. Refer to Appendix D in Queensland
                                                 Water Quality Guidelines for details on how to establish a minimum
                                                                                             th    th       th
                                                 water quality data set for deriving local 20 , 50 and 80
                                                 percentiles.
Open coastal            Aquatic                   turbidity: <1 NTU
waters                  ecosystem –               suspended solids: <10 mg/L
                        moderately                chlorophyll a: <1 µg/L
                        disturbed                 total nitrogen: <150 µg/L
                                                  oxidised N: <3 µg/L
                                                  ammonia N: <5 µg/L
                                                  organic N: <140 µg/L
                                                  total phosphorus: <16 µg/L
                                                  filterable reactive phosphorus (FRP): <5 µg/L
                                                  dissolved oxygen: 95 – 105% saturation
                                                  pH: 8.2 – 8.4
                                                  secchi depth: >5.0m
                                                                                    th   th       th
Area NLE1 –             Aquatic                  Maintain existing water quality (20 , 50 and 80 percentiles),
Noosa lower             ecosystem – high         habitat, biota, flow and riparian areas. (Refer to Appendix D in
estuary                 ecological value         Queensland Water Quality Guidelines for details.)
                                                         th     th    th
                                                 The 20 , 50 and 80 percentiles of existing water quality for NLE1
                                                 waters are:
                                                  turbidity: 1 – 2 – 4 NTU
                                                  suspended solids: 15 – 15 – 15 mg/L
                                                  chlorophyll a: 0.8 – 1.2 – 1.8 µg/L
                                                  total nitrogen: 150 – 180 – 240 µg/L
                                                  oxidised N: 2 – 3 – 6 µg/L
                                                  ammonia N: 4 – 8 – 15 µg/L
                                                  organic N: 140 – 160 – 220 µg/L
                                                  total phosphorus: 9 – 12– 15 µg/L
                                                  filterable reactive phosphorus (FRP): 2 –- 2 – 2 µg/L
                                                  dissolved oxygen: 90 – 95 – 105% saturation
                                                  pH: 8.0 – 8.2 – 8.4
                                                  secchi depth: 1.8 – 2.2 – 2.8m




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Noosa River environmental values and water quality objectives

  Table 2 Water quality objectives to protect aquatic ecosystem environmental value (refer to Plan
  WQ1401 for location of waters)
  Water area/type      Management         Water quality objectives to protect aquatic ecosystem EV ~
     (refer Plan      intent (level of
     WQ1401)            protection)
eer pf
 MARINE AND

 WATERS

 Area NH1 —         Aquatic             Maintain existing water quality (20°, 50° and 80° percentiles),
 Noosa headland      ecosystem — high | habitat, biota, flow and riparian areas. (Refer to Appendix D in
waters               ecological value | Queensland Water Quality Guidelines for details.)
                                        Note: there is insufficient information available to establish current
                                        water quality for these waters. Refer to Appendix D in Queensland
                                        Water Quality Guidelines for details on how to establish a minimum
                                        water quality data set for deriving local 20", 50" and 80"
                                        percentiles.
 Open coastal        Aquatic            * — turbidity: <1 NTU
waters               ecosystem —        =   suspended solids: <10 mg/L
                    moderately          =   chlorophyll a: <1 pg/L
                     disturbed          =   total nitrogen: <150 pg/L
                                        =   oxidised N: <3 pg/L
                                        =   ammonia N: <5 pg/L
                                        =~  organic N: <140 pg/L
                                        =   total phosphorus: <16 pg/L
                                        = — filterable reactive phosphorus (FRP): <5 ug/L
                                        =   dissolved oxygen: 95 — 105% saturation
                                        =   pH: 8.2 - 8.4
                                        =   secchi depth: >5.0m
 Area NLE1 —        Aquatic             Maintain existing water quality (20°, 50° and 80° percentiles),
 Noosa lower         ecosystem — high | habitat, biota, flow and riparian areas. (Refer to Appendix D in
 estuary             ecological value | Queensland Water Quality Guidelines for details.)
                                        The 20", 50" and 80" percentiles of existing water quality for NLE1
                                        waters are:
                                        =   turbidity: 1 -2-—4NTU
                                        =   suspended solids: 15 — 15 — 15 mg/L
                                        »   chlorophyll a: 0.8 — 1.2 — 1.8 pg/L
                                        =   total nitrogen: 150 — 180 — 240 ug/L
                                        ="  oxidised N: 2-3-6 ug/L
                                        =   ammonia N: 4-8- 15 ug/L
                                        ="  organic N: 140 — 160 — 220 pg/L
                                        =   total phosphorus: 9 — 12— 15 pg/L
                                        =   filterable reactive phosphorus (FRP): 2 —- 2 — 2 ug/L
                                        =   dissolved oxygen: 90 — 95 — 105% saturation
                                        »   pH: 8.0-8.2-8.4
                                        =   secchi depth: 1.8 — 2.2 —-2.8m

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