Annual Water Outlook1 December 2018

Legend

Water District

Lakes

Barwon Water reservoir

Water channel/pipelines

Main sewer

Water service basin/tank

Water treatment plant

Groundwater production bores

Sewer Flow Management Facility

Recycled water pipeline

Water reclamation plants

Recycled Water Plant

Recycled water tank

Special water supply catchment

Kilometres

Scale

0 1.5 3 6 9 12 15

Service Area

Ballan Ch

annel

Bostock

Channel

Wurd

ee Bol

uc

Inlet Channel

LakeCorangamite

LakeCundare

LakeWeeringLakeWeering

LakeGnarpurt

LakeRosine

Lake BeeacLake Beeac

LakeColacLakeColac

LakeMurdedukeLakeMurdeduke

LakeModewarreLakeModewarre

LakeConnewarre

Corio Bay

Bass Strait

CundarePool

Wurdee BolucReservoir

West BarwonReservoir

West GellibrandReservoir Olangolah

Reservoir

AllenReservoir

PainkalacReservoir

Lower Stony CreekReservoir

Upper Stony CreekReservoir

Lal LalReservoir

BostockReservoir

KorweingubooraReservoir

Barwon DownsBorefield

AngleseaBorefield

Marengo

Apollo Bay

Skenes Creek

Beech ForestKennett River

Wye River

Lorne

Aireys Inlet

Fairhaven

Anglesea

Torquay

BreamleaBarwon Heads

Ocean Grove

Mount Duneed

Point Lonsdale

Queenscli�

St Leonards

Indented Head

Portarlington

Drysdale

Leopold

Geelong

Moriac

Mt Moriac

Lara

Bannockburn

Little River

Werribee

Anakie

Lethbridge

Meredith

Elaine

Steiglitz

She Oaks

Bacchus Marsh

Ballan

Ballarat

Colac

Shelford

Inverleigh

Cressy

Winchelsea

BeeacDreeite

Alvie

Coragulac

Irrewarra

BirregurraStoneyford

Pirron Yallock

Deans Marsh

Bambra

Forrest

Kawarren

Gellibrand

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Stor

age

volu

me

(ML)

Stor

age

perc

ent f

ull

Restriction range

ActualStorage

In a median climate this is the most likely

outcome.

In a dry climate, storages could

follow this level.

If storages fall into this restriction range, we may consider implementing water restrictions.

How to read this document

Scale of water restriction likelihood Likelihood rating

Description

Very Rare

<1%

Event may occur only in extraordinary circumstances

Rare

1-4%

Event may occur only in exceptional circumstances

Unlikely

5-19%

Event could occur at some time

There is little opportunity, reason or means to occur

Possible

20-24%

Event might occur

There is some opportunity, reason or means to occur

Likely

50-79%

The event is likely to occur in most circumstances There is considerable opportunity, reason or means for the event to occur

Almost Certain

80-100%

Event is expected to occur in most circumstances

There is great opportunity, reason or means to occur

Under the worst case climate, storages could

reach this level.

Dec 2016 Jun 2017 Dec 2017 Jun 2018 Dec 2018 Jun 2019 Dec 2019 Jun 2020 Dec 2020

What the storage levels are forecast to be depending on the climate:

What the storage levels actually were over the past two years.

0%

Greater Geelong system System summary Geelong’s drinking water is supplied by catchments on the upper Barwon and Moorabool rivers. During drought

Barwon Water also has an entitlement to take water from Melbourne’s Yarra Thomson catchment, as well as access

to groundwater. We operate two Class A recycled water plants - the Northern Water Plant and the Black Rock Recycled Water Plant.

Climate outlook The Bureau of Meteorology forecast (issued on 15th Nov 2018) indicates that rainfall totals in our region are expected to be average for the next three months.

Storage outlook The short term storage outlook shows that even under the

worst climatic conditions water restrictions will not be necessary in the next two years, to November 2020.

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Dec 2016 Jun 2017 Dec 2017 Jun 2018 Dec 2018 Jun 2019 Dec 2019 Jun 2020 Dec 2020

Stor

age

volu

me

(ML)

Median climate

Dry climate

Worst climate

Restriction range

Actual storage

Water resources position: Current local storage (23/11/18):

56,746 ML out of 95,629 ML (59%)

Current Melbourne storage (01/11/18):

45,151 ML Estimated annual entitlement:

103,392 ML System yield: 53,480 ML

Population: 294,208 2017/18 bulk demand: 32,815 ML

Water restriction likelihood:

Very rare (<1%)

Restrictions would be required only in extraordinary circumstances.

Stor

age

perc

ent f

ull

Colac system

System summary

Colac’s drinking water is supplied from the West Gellibrand

and Olangolah reservoirs, on the Gellibrand River in the Otway Ranges. During drought, Colac’s water supply can

be supplemented with water from the Geelong water supply system via a recently completed pipeline.

Climate outlook

The Bureau of Meteorology forecast (issued on 15th Nov 2018) indicates that rainfall totals in our region are expected to be average for the next three months.

Storage outlook

The short term storage outlook shows that even under the

worst climatic conditions water restrictions will not be necessary in the next two years, to November 2020.

0

500

1,000

1,500

2,000

2,500

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Dec 2016 Jun 2017 Dec 2017 Jun 2018 Dec 2018 Jun 2019 Dec 2019 Jun 2020 Dec 2020

Stor

age

volu

me

(ML)

Stor

age

perc

ent f

ull

Median climate

Dry climate

Worst climate

Restriction range

Actual storage

Water resources position: Population: 14,222

System yield: 4,600 ML

Full storage volume: 2,648 ML Current storage (23/11/18):

2,631 ML (99% full) Annual entitlement: 5,400 ML

2017/18 bulk demand: 2,969 ML

Water restriction likelihood:

Very rare (<1%)

Restrictions would be required only in

extraordinary circumstances.

Lorne System System summary The Lorne system is supplied from Allen Reservoir on the St George River. Water is fully treated at the Lorne

Water Treatment Plant before being supplied to customers.

Climate outlook

The Bureau of Meteorology forecast (issued on 15th Nov 2018) indicates that rainfall totals in our region are expected to be average for the next three months.

Storage outlook

The short term storage outlook shows that even under

the worst climatic conditions water restrictions will not be necessary in the next two years, to November 2020.

0

50

100

150

200

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Dec 2016 Jun 2017 Dec 2017 Jun 2018 Dec 2018 Jun 2019 Dec 2019 Jun 2020 Dec 2020

Stor

age

volu

me

(ML)

Stor

age

perc

ent f

ull

Dry climate

Worst climate

Restriction range

Actual storage

Water resources position: Population: 1,759

System Yield: 370 ML

Full Storage Volume: 215 ML Current storage (23/11/18): 215 ML

(100% full) Annual entitlement: 510 ML

2017/18 demand: 368 ML

Water restriction likelihood:

Very rare (<1%)

Restrictions would be required only in

extraordinary circumstances.

Median climate

Apollo Bay system System summary Barham River supplies water to Apollo Bay, Marengo and Skenes Creek. Water is pumped to the Marengo

Basin (125ML) and the Apollo Bay Basin (250ML) and is fully treated before being supplied to customers.

Climate outlook

The Bureau of Meteorology forecast (issued on 15th Nov 2018) indicates that rainfall totals in our region are expected to be average for the next three months.

Storage outlook

The short term storage outlook shows that under

median or dry climatic conditions water restrictions will not be necessary in the next two years, to November

2020. However, under the worst case climate, water restrictions may need to be applied in summer 2020.

0

50

100

150

200

250

300

350

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Dec 2016 Jun 2017 Dec 2017 Jun 2018 Dec 2018 Jun 2019 Dec 2019 Jun 2020 Dec 2020

Stor

age

volu

me

(ML)

Stor

age

perc

ent f

ull

Median climate

Dry climate

Worst climate

Restriction range

Actual storage

Water resources position: Population: 1974

System Yield: 408 ML

Full Storage Volume: 375 ML Current storage (23/11/18):

351 ML (93% full) Annual entitlement: 800 ML

2017/18 demand: 437 ML

Water restriction likelihood:

Rare (1% - 4%)

Restrictions would be required only in

exceptional circumstances.

Gellibrand system

System summary

Gellibrand is located approximately 25 km south of

Colac and supplies less than 100 properties. The Gellibrand system is supplied from Lardners Creek.

Water is pumped from the creek to the Gellibrand Water Treatment Plant prior to being gravity fed to the water distribution network.

Climate outlook

The Bureau of Meteorology forecast (issued on 15th

Nov 2018) indicates that rainfall totals in our region are expected to be average for the next three months.

Storage outlook

The short term storage outlook shows that even under the worst climatic conditions, water restrictions will not be necessary in the next two years, to November 2020.

0

1

10

100

1000

Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Ave

rage

ava

ilabl

e w

ater

and

dem

and

on a

loga

rithm

ic

scal

e [M

L/m

th]

Lowest riverflow

Average riverflow

Highest demand

Average demand

Average available supply

Water resources position: Population: 71

System Yield: 60ML

Annual entitlement: 60 ML 2017/18 demand: 18 ML

Water restriction likelihood:

Very rare (<1%)

Restrictions would be required only in extraordinary circumstances.

Five-year action plan Geelong five-year action plan

Action Timing Status We will work with the community, government and other stakeholders to renew our Barwon Downs groundwater licence by 2019 developed in consideration of an improved understanding of the environmental and social impacts of the borefield operation.

2019 In progress

We will engage and explore opportunities with Traditional Owners to recognise and include Aboriginal values in water resource management.

Ongoing In progress

We will investigate the opportunity to further optimise the way we use water sources in the Geelong water supply system by developing a decision-making framework to guide operation.

2018 Deferred

We will develop, implement and monitor water efficiency programs like the ‘Target Your Water Use’ and the ‘Schools Water Efficiency Program’.

Ongoing Ongoing

Colac five-year action plan Action Timing Status We will optimise operating rules and triggers for when we should transfer water from the Barwon system to Colac.

2018 Early

stages We will continue to deliver the Colac Demand Management Strategy and commission the new pipeline connecting Colac to the Geelong system.

2018 Complete

We will develop, implement and monitor water efficiency programs like the ‘Target Your Water Use’.

Ongoing Ongoing

Lorne five-year action plan Action Timing Status We will engage with the community and Traditional Owners to review options and identify a preferred approach by 2022 to ensure water supply security for the long term.

2022 Not

started We will commence early planning works for the preferred approach to maintain water security in the long term.

2022+ Not

started We will develop, implement and monitor water efficiency programs like the ‘Target Your Water Use’.

Ongoing Ongoing

We will undertake research and development that contributes to ongoing innovation in water efficiency measures.

Ongoing Ongoing

Apollo Bay five-year action plan Action Timing Status

We will engage with the community and Traditional Owners to review options and identify a preferred approach by 2022 to ensure water supply security for the long term.

2022 Early

stages We will commence early planning works for the preferred approach to maintain water security in the long term.

2022 Early

stages We will develop, implement and monitor water efficiency programs like the ‘Target Your Water Use’.

Ongoing Ongoing

We will undertake research and development that contributes to ongoing innovation in water efficiency measures.

Ongoing Ongoing

Gellibrand five-year action plan

Beyond our ongoing operational processes to monitor conditions and maintain supplies, there are no specific actions for the Gellibrand water supply system.

barwonwater.vic.gov.au

55-67 Ryrie StreetPO Box 659Geelong Victoria 3220

1300 656 007 | info@barwonwater.vic.gov.au