DEECA Victorian Water Accounts 2022-23

About the area

The Deutgam Water Supply Protection Area (WSPA) covers a shallow sand aquifer. It is located in the outer south-western suburbs of Melbourne, extending from Werribee in the north to Port Phillip Bay in the south.

The water authority responsible for managing groundwater in the Deutgam WSPA is Southern Rural Water.

The Deutgam WSPA Local Management Plan applies to groundwater resources for all formations between the surface to 30 m below the surface.

More information on groundwater management can be found on the Southern Rural Water website.

Groundwater level trends

Table 1: Groundwater level trends, Deutgam WSPA

Groundwater management unit ^{1, 2}		2021-22	2022-23
Water supply protection area
Deutgam		Stable	Stable	Stable	Stable	Stable	Stable	Stable	Stable

Groundwater management unit ^{1, 2}		2021-22	2022-23
Water supply protection area
Deutgam		Stable	Stable	Stable	Stable	Stable	Stable	Stable	Stable

Groundwater restrictions

In the Deutgam WSPA, there were no restrictions on groundwater licences in 2022-23. This was different to the previous year when users with groundwater licences were only able to take 50% of their entitlement.

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, Deutgam WSPA

Use type	2021-22 (ML)	2022-23 (ML)
Licensed use (non-urban)	5,082	5,082
Total	5,082	5,082

Use type	2021-22 (ML)	2022-23 (ML)
Licensed use (non-urban)	5,082	5,082
Total	5,082	5,082

Available water and use

The table below shows the total water available and used under entitlements, and estimated domestic and stock use in 2022-23. Total water available under entitlements is the sum of opening carryover, allocation issued and the net trade in or out of water.

Estimated domestic and stock use is calculated based on an assumed usage per registered bore per year. In this WSPA, 1.5 ML usage per bore per year is assumed.

More information on groundwater use and availability has been detailed in How we account for groundwater.

Table 3: Groundwater availability and use, Deutgam WSPA

Use type	Available water (ML)	Water taken (ML)
Licensed use (non-urban)	0	5,082	0	5,082	212
Domestic & Stock	-	-	-	-	59
Total 2022-23	0	5,082	0	5,082	271
Total 2021-22	0	2,540	0	2,540	269

Use type	Available water (ML)	Water taken (ML)
Licensed use (non-urban)	0	5,082	0	5,082	212
Domestic & Stock	-	-	-	-	59
Total 2022-23	0	5,082	0	5,082	271
Total 2021-22	0	2,540	0	2,540	269

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

Entitlement volume did not exceed the PCV

The volume of entitlements (5,082 ML) in the Deutgam WSPA did not exceed the PCV (5,100 ML).

Total volume extracted under licences was within the available volume

The total volume extracted under licences (212 ML) was within the volume available for the year (5,082 ML).

Table 4: PCV vs total entitlement volumes, Deutgam WSPA

Groundwater management unit		PCV	Licensed entitlement (ML)	Water available under licences (ML)	Water taken under licences (ML)
Deutgam WSPA		5,100	5,082	5,082	212

Groundwater management unit		PCV	Licensed entitlement (ML)	Water available under licences (ML)	Water taken under licences (ML)
Deutgam WSPA		5,100	5,082	5,082	212

Management responsibilities

Management of water in the Deutgam WSPA is undertaken by Southern Rural Water.

Authority	Management responsibilities
Southern Rural Water	Managing groundwater resources. Developing and implementing groundwater management plans. Issuing licences for groundwater use, bore construction, and surface water diversions. Administering water for domestic and stock use.

Authority

Management responsibilities

Southern Rural Water

Managing groundwater resources.

Developing and implementing groundwater management plans.

Issuing licences for groundwater use, bore construction, and surface water diversions.

Administering water for domestic and stock use.

Nearby groundwater management units

Cut Paw Paw GMA

Explore the Cut Paw Paw Groundwater Management Area (GMA).

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Merrimu GMA

Explore the Merrimu Groundwater Management Area (GMA).

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Deutgam WSPA

On this page:

In this area

About the area

Groundwater level trends

Table 1: Groundwater level trends, Deutgam WSPA

Groundwater restrictions

Entitlements and use

Entitlement volumes

Table 2: Groundwater entitlements at 30 June, Deutgam WSPA

Available water and use

Table 3: Groundwater availability and use, Deutgam WSPA

Compliance

Key points on compliance against entitlements

Entitlement volume did not exceed the PCV

Total volume extracted under licences was within the available volume

Table 4: PCV vs total entitlement volumes, Deutgam WSPA

Management responsibilities

Nearby groundwater management units

Cut Paw Paw GMA

Merrimu GMA

Back to groundwater map

Victorian Water Accounts 2022-23

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Groundwater management unit ^{1, 2}	2021-22				2022-23
Groundwater management unit ^{1, 2}	Sep-21	Dec-21	Mar-22	Jun-22	Sep-22	Dec-22	Mar-23	Jun-23
Water supply protection area
Deutgam	Stable	Stable	Stable	Stable	Stable	Stable	Stable	Stable

Use type	Available water (ML)				Water taken (ML)
Use type	Carryover	Licensed volume allocated	Net trade	Total water available	Water taken (ML)
Licensed use (non-urban)	0	5,082	0	5,082	212
Domestic & Stock	-	-	-	-	59
Total 2022-23	0	5,082	0	5,082	271
Total 2021-22	0	2,540	0	2,540	269