About the area
- The Tarwin Groundwater Management Area (GMA) covers a shallow sand aquifer centred on Venus Bay.
- The water authority responsible for managing groundwater in the Tarwin GMA is Southern Rural Water.
- The Tarwin GMA Local Management 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 website.
Groundwater level trends
Table 1: Groundwater level trends, Tarwin GMA
Groundwater restrictions
There were no restrictions on licensed use for the Tarwin GMA in 2021-22.
Entitlements and use
Groundwater is available for licensed (non-urban) supply and for domestic and stock use.
Entitlement volumes
Table 2: Groundwater entitlements at 30 June, Tarwin GMA
Available water and use
The table below shows the total water available and used under entitlements, and estimated domestic and stock use in 2021-22. Total water available under entitlements is the sum of: opening carryover, allocation issued and the net of the in/out trade of water.
Estimated domestic and stock use is calculated based on an assumed usage per registered bore per year. In this GMA, 1.5 ML usage per bore per year is assumed.
More information on groundwater use and availability has been detailed in the How do we account for section.
Table 3: Groundwater availability and use, Tarwin GMA
Compliance
Compliance against water entitlements is reported for this groundwater management unit (GMU) in two areas:
- entitlement issued: the volume of entitlements issued in the GMU does not exceed relevant PCVs or has not increased without appropriate approvals
- water extracted: 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
Entitlement volume did not exceed the PCV
The volume of entitlements (58 ML) in the Tarwin GMA did not exceed the PCV (1,300 ML).
Total volume extracted under licences was within the available volume
The total volume extracted under licences (8 ML) was within the volume available for the year (58 ML).
Table 4: PCV vs total entitlement volumes, Tarwin GMA
Management responsibilities
Management of water in the Tarwin GMA is undertaken by Southern Rural Water.
| Authority | Management responsibilities |
|---|---|
| Southern Rural Water |
|
