About the area
The Wa De Lock groundwater management area (GMA) covers a shallow sand aquifer with silts and clays centred on the Avon River, where it partially overlies the Sale water supply protection area (WSPA), the Rosedale GMA and the Stratford GMA.
The water authority responsible for managing groundwater in the Wa De Lock GMA is Southern Rural Water.
The Central Gippsland Shallow Aquifers Local Management Plan incorporates the Wa De Lock GMA, and details 3 management zones where the plan applies to groundwater resources for all formations between the surface and 25 m below the surface.
More information on groundwater management can be found on the Southern Rural Water
Groundwater level trends
Table 1: Groundwater level trends, Wa De Lock GMA
Response to water availability
Groundwater restrictions
There were no restrictions on licensed use in the Wa De Lock GMA in 2024-25.
Entitlements and use
Groundwater entitlements have been issued for licensed (non-urban) use and urban supply to Boisdale and Briagolong in the Wa De Lock GMA. Groundwater is also available for domestic and stock use.
Entitlement volumes
Table 2: Groundwater entitlements at 30 June, Wa De Lock GMA
Available water and take
The table below shows the total water available and taken under entitlements, and estimated domestic and stock use in 2024-25. Total water available under entitlements is calculated as the sum of: opening carryover from the prior year (where available), allocation issued during the reporting year, and the net trade in or out of water, across all entitlements. The level of allocation issued is reduced if there are any restrictions in place.
Estimated domestic and stock use is calculated based on an assumed usage per registered bore per year. In this GMA, the assumed usage is 1.5 ML per bore per year.
More information on groundwater use and availability has been detailed in How we account for
Table 3: Groundwater availability and take, Wa De Lock GMA
Compliance
Compliance against water entitlements is reported for this groundwater management unit (GMU) in 2 areas:
- entitlement issued: that the volume of entitlements issued in the GMU does not exceed relevant permissible consumptive volumes (PCVs) or has not increased without appropriate approvals
- water extracted: that the volume of water taken under entitlements during the year does not exceed the total water available to licence holders.
Key points on compliance against entitlements in 2024-25
Entitlement volume did not exceed the PCV
The volume of entitlements (29,052 ML) in the Wa De Lock GMA did not exceed the PCV (30,735 ML).
Total volume extracted under licences was within the available volume
The total volume extracted under licences (3,777 ML) was within the volume available for the year (29,067 ML).
Table 4: PCV vs total entitlement volumes, Wa De Lock GMA
Management responsibilities
Management of water in the Wa De Lock GMA is undertaken by Southern Rural Water.
| Authority | Management responsibilities |
|---|---|
| Southern Rural Water |
|
