Following recent floods in QLD and NSW, significant flows have entered the Barwon Darling river system. We’re keeping a close watch on the flows as they proceed down the system.
We are pleased that the resumption of flow rule we put in place earlier this year has wet the system enough to maximise the benefits of the current event.
Given the amount of water on the floodplain, providing an accurate forecast into Menindee is difficult at this stage. For example, much of the flooding we’ve seen in the Gwydir valley will enter the Gwydir wetlands and not necessarily flow into Barwon Darling.
However, based on current forecast inflow volumes, there will potentially be between 100 and 300 GL of additional water available for use in Menindee or the Lower Darling.
We are watching the weather and flow forecasts closely and given the time that it takes for the water to move down the system we are taking this time to make well informed decisions.
Based on current flows seen upstream, it is possible that Lakes Pamamaroo and Wetherell will fill. However, the decision on how any water above that which is required to fill these upper lakes will depend on a range of factors including the total volume likely to reach the Lakes.
WaterNSW insights portal provides real time data that is readily accessible.
The draft Western Regional Water Strategy, which is due to be released towards the end of 2021, will include:
- A proposed definition of connectivity.
- Hydrological modelling to assess the extent to which the actions already undertaken to improve connectivity have been effective.
- Additional connectivity options for discussion, such as proposed flow targets for the Menindee Lakes and/or at the confluence with the Murray River.
- Initial results of modelling incorporating new climate data.