Table BRD2. Commonwealth environmental water accounting information for the Border Rivers valley over 2015-16 water year. Allocated Carry Delivered LTAAY Trade Carried Forfeited registered volume over (ML) (ML) (ML) over to (ML) volume (ML) available 2016-17 (ML) (ML) 3524 10118 1248 13260 0 8876 0 Figure BRD2: Timing and duration of water actions implemented by the CEWO during the 2015-16 water year in the Border Rivers valley. Contribution of Commonwealth Environmental Water to Flow Regimes Farnbro Figure BRD3: Contribution of environmental water delivery at Farnbro. Horizontal lines indicate thresholds for very low flows, low flows and low freshes (from lowest to highest). At Farnbro on Severn environmental water contributed 1% of the total streamflow volume (all of which was Commonwealth environmental water). Environmental watering actions affected streamflows for 1% of days between 1 July 2015 and 30 June 2016 (Figure BRD3 and BRD4). Without environmental water, the durations of very low flows (i.e. < 3.9 Ml/day) in the periods October to December, January to March and April to June would have substantially exceeded durations expected in an average year in the natural flow regime. However, environmental water had little effect on the duration of these very low flows, which occurred for 78% of the year. Similarly, without environmental water, the durations of medium low flows (i.e. < 19 Ml/day) in the periods July to September, October to December, January to March and April to June would have all substantially exceeded durations expected in an average year in the natural flow regime. However, environmental water had little effect on the duration of these medium low flows, which occurred for 91% of the year. There was at least one low fresh (i.e. > 97 Ml/day) in the periods July to September and January to March. Environmental water made no change to the duration of these low freshes. There was no medium or high freshes this year. Figure BRD4: Contribution of environmental water delivery at Farnbro as percentiles in the natural and baseline flow series. Goondiwindi
Table BRD2. Commonwealth environmental water accounting information for the Border Rivers valley over 2015-16 water year. registered volume (ML) Allocated volume (ML) Carry over available (ML) Delivered (ML) LTAAY (ML) Trade (ML) Carried over to 2016-17 Forfeited (ML) 3524 10118 1248 13260 0 8876 0 Figure BRD2: Timing and duration of water actions implemented by the CEWO during the 2015-16 water year in the Border Rivers valley. Contribution of Commonwealth Environmental Water to Flow Regimes Farnbro Figure BRD3: Contribution of environmental water delivery at Farnbro. Horizontal lines indicate thresholds for very low flows, low flows and low freshes (from lowest to highest). At Farnbro on Severn environmental water contributed 1% of the total streamflow volume (all of which was Commonwealth environmental water). Environmental watering actions affected streamflows for 1% of days between 1 July 2015 and 30 June 2016 (Figure BRD3 and BRD4). Without environmental water, the durations of very low flows (i.e. < 3.9 Ml/day) in the periods October to December, January to March and April to June would have substantially exceeded durations expected in an average year in the natural flow regime. However, environmental water had little effect on the duration of these very low flows, which occurred for 78% of the year. Similarly, without environmental water, the durations of medium low flows (i.e. < 19 Ml/day) in the periods July to September, October to December, January to March and April to June would have all substantially exceeded durations expected in an average year in the natural flow regime. However, environmental water had little effect on the duration of these medium low flows, which occurred for 91% of the year. There was at least one low fresh (i.e. > 97 Ml/day) in the periods July to September and January to March. Environmental water made no change to the duration of these low freshes. There was no medium or high freshes this year. Figure BRD4: Contribution of environmental water delivery at Farnbro as percentiles in the natural and baseline flow series. Goondiwindi
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