'Near to final' draft for independent review - 9 May 2016 Table 9: Site-specific flow indicators for the Narran Lakes UEA. All volumes are measured at the Wilby Wilby gauge on the Narran River. The frequency, unless otherwise indicated, is the average number of years between events. The frequency range is shown from low uncertainty to high uncertainty. Magnitude: Basis of Duration Frequency Basis of duration Timing Basis of timing Basis of frequency volume (ML) magnitude (days) (years) 25,000 Habitat vigour of 60 Any time of Summer 1 - 1.3 Frequency of inundation lignum in year, dominated for vigour of large clumps Required duration to fill the northern lakes preferably system, most of lignum in key rookery lakes of northern lakes zone zone, core summer flows tend to habitats: around 60% rookery habitat occur in summer cover 50,000 Habitat vigour of 90 Retention of water on As above As above 1.3 - 2.6 Frequency of inundation lignum northern lakes zone and for vigour of lignum surrounding part of the northern plants: around 20% core habitat, floodplain cover some of northern floodplain. 154,000 90 Time that it takes many As above Volume Waterbirds may Twice in 8 To provide at least two associated with waterbird species to fledge continue years - breeding opportunities large-scale breeding events twice in 10 during the life-cycle of a waterbird across winter years straw-necked ibis to breeding protect and restore waterbird populations. 250,000 180 As above 8 - 10 Habitat in all of Required duration for water Summer Critical period for survival open water to move onto large areas of dominated of lignum in Narran lakes and much northern and central system, but will Lakes (in small form and of the northern floodplain be largely an sparse) and other key and central unregulated vegetation species on floodplains. event so can northern and central happen any time floodplains Page 89
'Near to final' draft for independent review - 9 May 2016 Table 9: Site-specific flow indicators for the Narran Lakes UEA. All volumes are measured at the Wilby Wilby gauge on the Narran River. The frequency, unless otherwise indicated, is the average number of years between events. The frequency range is shown from low uncertainty to high uncertainty. Magnitude: volume (ML) Basis of magnitude Duration (days) Basis of duration Timing Basis of timing Frequency (years) Basis of frequency 25,000 Habitat vigour of lignum in northern lakes zone, core rookery habitat 60 Required duration to fill the lakes of northern lakes zone Any time of year, preferably summer Summer dominated system, most flows tend to occur in summer 1 - 1.3 Frequency of inundation for vigour of large clumps of lignum in key rookery habitats: around 60% cover 50,000 Habitat vigour of lignum surrounding core habitat, some of northern floodplain. 90 Retention of water on northern lakes zone and part of the northern floodplain As above As above 1.3 - 2.6 Frequency of inundation for vigour of lignum plants: around 20% cover 154,000 Volume associated with large-scale waterbird breeding 90 Time that it takes many waterbird species to fledge As above Waterbirds may continue breeding events across winter Twice in 8 years - twice in 10 years To provide at least two breeding opportunities during the life-cycle of a straw-necked ibis to protect and restore waterbird populations. 250,000 Habitat in all of open water lakes and much of the northern and central floodplains. 180 Required duration for water to move onto large areas of northern and central floodplain As above Summer dominated system, but will be largely an unregulated event so can happen any time 8 - 10 Critical period for survival of lignum in Narran Lakes (in small form and sparse) and other key vegetation species on northern and central floodplains Page 89
EWR-Condamine-Balonne-draft.docx