'Near to final' draft for independent review - 2 May 2016 Table 7. Site-specific flow indicators for lateral connectivity for the Barwon- Darling UEA. In this table, frequency is the number of years between watering events. Frequency range is shown as low uncertainty to high uncertainty Magnitude: Duration Basis of Basis of magnitude Timing Basis of timing Freq. Basis of frequency flow (ML/d) (days) duration Inundation of riparian forests, and These flows will Median near-channel and fringing be largely Reflects flow requirements for duration above 30,000 wetlands. The flow is around Any unregulated vigorous river red gum forest, and this flow under (Bourke bankfull, which is important for in- 24 time of events and can 2 - 3 lignum communities in riparian the without gauge) forests. Frequency based on channel geomorphic processes year occur at any development and maintaining habitats. time of year historical flows. scenario Frequency based on historical Connectivity with inner floodplain flows, and the requirements of 45,000 including approximately 90% of As vegetation in river red gum (Bourke 22 As above As above 3.5 - 4 wetlands. above woodlands and wetlands, including gauge) some habitat within the Talyawalka-Teryaweynya system Broad floodplain inundation Frequency based on historical 65,000 flows starting to inundate large As flows, and the requirements of (Bourke 24 As above As above 6 - 8 above areas of black box and coolibah vegetation including black box, gauge) woodlands and some grasslands. coolibah Minimum volume to fill the more The duration is frequently inundated lakes in the 2,350 GL tied to a Talyawalka - Teryaweynya Frequency requirements of native above volume of system based on 5 events. As 10 - grasslands, as well as critical 30,000 ML/d > 60 inflow to fill As above 12 Foraging of waterbirds. above frequencies for black box, coolibah (Wilcannia Talyawalka - Rejuvenation of grasslands. and lignum gauge) Teryaweyna Substantial exchange of material system between river and floodplain. Page 60
'Near to final' draft for independent review - 2 May 2016 Table 7. Site-specific flow indicators for lateral connectivity for the Barwon- Darling UEA. In this table, frequency is the number of years between watering events. Frequency range is shown as low uncertainty to high uncertainty Magnitude: flow (ML/d) Basis of magnitude Duration (days) Basis of duration Timing Basis of timing Freq. Basis of frequency 30,000 (Bourke gauge) Inundation of riparian forests, and near-channel and fringing wetlands. The flow is around bankfull, which is important for in- channel geomorphic processes and maintaining habitats. 24 Median duration above this flow under the without development scenario Any time of year These flows will be largely unregulated events and can occur at any time of year 2 - 3 Reflects flow requirements for vigorous river red gum forest, and lignum communities in riparian forests. Frequency based on historical flows. 45,000 (Bourke gauge) Connectivity with inner floodplain including approximately 90% of wetlands. 22 As above As above As above 3.5 - 4 Frequency based on historical flows, and the requirements of vegetation in river red gum woodlands and wetlands, including some habitat within the Talyawalka-Teryaweynya system 65,000 (Bourke gauge) Broad floodplain inundation flows starting to inundate large areas of black box and coolibah woodlands and some grasslands. 24 As above As above As above 6 - 8 Frequency based on historical flows, and the requirements of vegetation including black box, coolibah 2,350 GL above 30,000 ML/d (Wilcannia gauge) Minimum volume to fill the more frequently inundated lakes in the Talyawalka - Teryaweynya system based on 5 events. Foraging of waterbirds. Rejuvenation of grasslands. Substantial exchange of material between river and floodplain. > 60 The duration is tied to a volume of inflow to fill Talyawalka - Teryaweyna system As above As above 10 - 12 Frequency requirements of native grasslands, as well as critical frequencies for black box, coolibah and lignum Page 60
EWR-Barwon-Darling-draft.docx