This report is the most sensible and well written one Ive found. Their conclusion seems sound. They recommended bores that can not only extract water but can also be used to recharge the aquifier with better flood water when the Darling has high flows. ............................ During high flows in the Darling River, the flood water is diverted into the Menindee Lakes, as is the current practice. This allows replenishment of the surface water storages and the opportunity to harvest episodic flood events in the Darling River. During and following these events, Broken Hill water supply and treatment is identical to the existing situation with the water source being the Darling River weir pool (Figure 26a). In this replenishment phase, the major difference to existing arrangements is that the weir pool is also the source for water that is treated, piped and injected into the Calivil aquifer. High flows in the Darling River tend to have relatively low salinities when compared to when flow in the river is low. This means that replenishing aquifer storage during high-flow river conditions will have a water quality benefit from a source water salinity perspective. ............................... My summary of the rest. Then, when the aquifer has been recharged enough to enable drought reserves (with no evaporation) the release of Menindee Lakes water can be regulated to make surface water available to downstream users or to provide environmental benefits. Water will continue to be drawn from Weir 32. If there is prolonged drought or other events such as algal blooms they use the groundwater storage.
Posted on: Tue, 20 Jan 2015 00:25:47 +0000
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