Flow peaks along the Barwon-Darling As shown below, the peak flows recorded at gauges along the Barwon-Darling are gradually reducing as the northern connectivity event meanders downstream. This is due to the natural processes of attenuation (spreading of the flow along the channel that results in a reduced peak), seepage and evaporation. During the northern connectivity event, the gauged peak flow in the Barwon-Darling river at: Collarenebri and Walgett was 1,200 ML/day; Brewarrina was 1,000 ML/day; Bourke was 900 ML/day; Louth was 850 ML/day; and Tilpa was 650 ML/day (below). 5 The flow in the Darling River at Wilcannia (green line above) has reached 494 ML/day this morning, up from 1 ML/day on last Monday, and is expected to peak between 500 - 525 ML/day. 6 Volume and destination As the weeks roll past and the flow meanders downstream, the volume of water recorded at each flow gauge is reducing gradually. Of the 23 GL delivered from the Border Rivers and Gwydir systems into the Barwon-Darling, about half of it (11.8 GL) has passed Bourke. About a quarter of the original volume (5-6 GL) is expected to pass Wilcannia, and about 1-2 GL is expected to pass into the Menindee Lakes, which is about 5-10% of the original volume that passed Collarenebri. This was expected from the natural seepage and is not as a result of any significant pumping (see of antecedent flows’ for more of a discussion on these system ‘significance ‘losses’). To put this inflow volume in context of the Menindee Lakes System, it is less than 0.1% of the total capacity of the storage, and considerably less than the annual evaporation and seepage from the lakes. Any inflows from the northern connectivity event are expected to be contained in the Darling River channel upstream the ​ Lakes Weir, in Lake Wetherell. Wetherell contains some deep waterholes serve​ important refuges for native animals and . Fish data from the Windmill’ site in the update of 25 May is a ‘Viewmont sample of the fish community in Lake Wetherell: with a lot of carp gudgeon (a small native fish) recorded.
Flow peaks along the Barwon-Darling As shown below, the peak flows recorded at gauges along the Barwon-Darling are gradually reducing as the northern connectivity event meanders downstream. This is due to the natural processes of attenuation (spreading of the flow along the channel that results in a reduced peak), seepage and evaporation. During the northern connectivity event, the gauged peak flow in the Barwon-Darling river at: Collarenebri and Walgett was 1,200 ML/day; Brewarrina was 1,000 ML/day; Bourke was 900 ML/day; Louth was 850 ML/day; and Tilpa was 650 ML/day (below). 5 The flow in the Darling River at Wilcannia (green line above) has reached 494 ML/day this morning, up from 1 ML/day on last Monday, and is expected to peak between 500 - 525 ML/day. 6 Volume and destination As the weeks roll past and the flow meanders downstream, the volume of water recorded at each flow gauge is reducing gradually. Of the 23 GL delivered from the Border Rivers and Gwydir systems into the Barwon-Darling, about half of it (11.8 GL) has passed Bourke. About a quarter of the original volume (5-6 GL) is expected to pass Wilcannia, and about 1-2 GL is expected to pass into the Menindee Lakes, which is about 5-10% of the original volume that passed Collarenebri. This was expected from the natural seepage and is not as a result of any significant pumping (see ‘significance of antecedent flows’ for more of a discussion on these system ‘losses’). To put this inflow volume in context of the Menindee Lakes System, it is less than 0.1% of the total capacity of the storage, and considerably less than the annual evaporation and seepage from the lakes. Any inflows from the northern connectivity event are expected to be contained in the Darling River channel upstream the Lakes Weir, in Wetherell. ​ Lake Wetherell contains some deep waterholes serve​ important refuges for native and data from the ‘Viewmont Windmill’ site in the update of 25 May is a sample of the fish community in Lake Wetherell: with a lot of carp gudgeon (a small native fish) recorded. animals Fish .