Table 8 Site-specific ecological targets and associated flow indicators for the Lower Murrumbidgee River (in-channel) Without-development and Site-specific flow indicators baseline event frequencies Proportion of Proportion of Frequency – proportion of Flow rate years event years event Site-specific ecological targets years event required required Duration occurred under occurred (measured at (minimum Timing modelled under Balranald) continuous) Low High modelled (ML/d) baseline uncertainty uncertainty conditions (%) conditions (%) (%) (%) December to Provide a flow regime which supports recruitment 1,100 25 days 77 58 96 32 May opportunities for a range of native aquatic species (e.g. fish, frogs, turtles, invertebrates) October - 4,500 20 days 72 54 90 35 December Provide a flow regime which supports key ecosystem functions, particularly those related to longitudinal October - 3,100 30 days 73 55 91 29 connectivity and transport of sediment, nutrients and carbon March Note: Multiplication of the flow rate by the duration and frequency (proportion of years event required) does not translate into the additional volume of water the site needs to be environmentally sustainable. This is because part of the required flow is already provided under baseline conditions. Additional environmental water required is the amount over and above the baseline flows.
Table 8 Site-specific ecological targets and associated flow indicators for the Lower Murrumbidgee River (in-channel) Site-specific ecological targets Site-specific flow indicators Without-development and baseline event frequencies Flow rate required (measured at Balranald) (ML/d) Duration (minimum continuous) Timing Frequency – proportion of years event required Proportion of years event occurred under modelled conditions (%) Proportion of years event occurred under modelled baseline conditions (%) Low uncertainty (%) High uncertainty (%) Provide a flow regime which supports recruitment opportunities for a range of native aquatic species (e.g. fish, frogs, turtles, invertebrates) Provide a flow regime which supports key ecosystem functions, particularly those related to longitudinal connectivity and transport of sediment, nutrients and carbon 1,100 25 days December to May 77 58 96 32 4,500 20 days October - December 72 54 90 35 3,100 30 days October - March 73 55 91 29 Note: Multiplication of the flow rate by the duration and frequency (proportion of years event required) does not translate into the additional volume of water the site needs to be environmentally sustainable. This is because part of the required flow is already provided under baseline conditions. Additional environmental water required is the amount over and above the baseline flows.
EWR-Lower-Murrumbidgee-River.docx