Managed Aquifer Recharge
Managed Aquifer Recharge (MAR) is the process of adding a water source such as harvested storm water to an aquifer under controlled conditions. This water is then available to be used at a later time. Water can be recharged by a number of methods including infiltration via basins or galleries or by the use of injection wells.
Orange City Council is examining the possibility of using the Basalt Aquifer to the south of the city for MAR.
The project proposes the establishment of bores close to the city to fully understand the capacity, economics and operational requirements of MAR in different rock types.
Two of the required seven bores exist (Showground and Clifton Grove) and it is proposed to establish an additional five bores to the south of Orange, on basalt rock. The estimated capital cost of these works is in the order of $1.3m.
The Council is examining using the aquifer to store water during wetter periods. This water could then be utilised during drier times.
There are a number of benefits in using this as a storage system including greatly reducing evaporation, delivering transportation and energy savings and lower construction costs for a large storage body.
This project has only been examined through desktop analysis at this stage and would require further in-depth analysis before it could be developed.