City of Casey Integrated Water Management Plan...Contents Vision 03 What is a Water Efficient City? 03 Values 04 Integrated Water Management 04 Council Water Plans and Strategies 05

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City of Casey Integrated Water Management Plan

Building a Water Efficient Casey

Contents

Vision 03What is a Water Efficient City? 03Values 04Integrated Water Management 04Council Water Plans and Strategies 05

Casey’s Catchment and Waterways 06Catchment Context: Two Bays in One City 06Catchment & Index Stream Condition 07

Casey’s Achievements 08Water Saving Achievements 08Stormwater Quality Achievements 09

Water in Casey – Current 10Casey’s Stormwater 11

Water in Casey – Future 12Casey’s Stormwater 13Council’s Future Water Use 13

Targets 14Water Saving Target 14Stormwater Quality Target 14Implementation Plan 15

Roles and Responsibilities 16for Water Management

Cover Image: Wetland Roosting, Berwick Springs Estate, Berwick – Stefan SchroederThis page: Casey Fields of Dreams 2, Casey Fields, Cranbourne East – Anthony Horsley

City of Casey Integrated Water Management Plan02

A City where water sources are managed in a way that it becomes adaptive and resilient to changing land use, population growth, low drinking water availability and a changing climate.

Figure: Preferred demand for alternative water sources in a Water Sensitive City (adapted from Holt, 2003) Minimise Protect

Reuse

Sewage to treatment plant

Sewage treatment

plant

Recycled water

Potable Water

Supply

Human consumption:

kitchen

Shower & bathroom

taps

Bio–retention raingardens

Stormwater to waterways & bays

Sewage

Rainwater tank

Hot water system

Clothes washing

Garden irrigation

Toilet flushing

Minimise

Vision

The City of Casey’s Water Management Vision is to build a “Water Efficient City”.

What is a Water Efficient City?

03City of Casey Contents

Integrated Water Management

Integrated Water Management (IWM) is a holistic approach to the way water is managed and considers drinking water, stormwater and wastewater.

Aspects of Integrated Water Management (Source: Hoban and Wong 2006)

Values

The following values drive a Water Efficient City

01 02 03

Urban areas as water supply catchments

Natural assets and biodiversity are valued

Active and involved communities

» Water is managed as a fit-for-purpose resource

» Water is protected and the natural environment is improved

» Maximise the benefits of water for the community

» Providing usable, engaging open spaces that encourage people to be active and support health and wellbeing

» Providing places for people to enjoy and interact with water and each other

Residents value water and how water is managed.

Sustainable supply options

Demand management

Stormwater reuse

Rainwater reuse

Reduced sewer

overflows

Greywater

Recycled water

INTEGRATED WATERCYCLE MANAGEMENT

Improved wastewater treatment

Stormwater quality

improvement

WASTEWATER

STORMWATER

DRINKING WATER


The purpose of the plan is to deliver the following outcomes:

Purpose of the Integrated Water Management Plan

» Avoid potable (drinking) water use and associated cost

» Use and manage water resources as fit-for-purpose

» Protect and improve the health of waterways and bays

» Provide water management that achieves economic, environmental and community outcomes

» Enhance liveability

Image: Aussie Green and Gold kissed by the sky, Wilson Botanic Park, Berwick – Angela Riseley

Council Water Plans and Strategies

Casey’s Integrated Water Management Plan will replace two existing water plans.

» Stormwater Management Plan (Adopted 6 July 2004)

» Sustainable Water Use Plan (Adopted 7 March 2006)

An Integrated Water Management Plan will create a City that is more resilient to urban development, climate change and future population growth.

Why do we need an Integrated Water Management (IWM) Plan?

» Provides a comprehensive water and pollutant inventory for the City

» Establishes a set of targets in accordance with the vision and values

» Identifies the most cost effective way forward

» Establishes an implementation plan to be actioned by Council

The Plan

WASTEWATER

05Water Plans and Strategies Why do we need an IWM Plan?

Casey’s Catchment and Waterways

Catchment Context: Two Bays in One City

The City of Casey falls within two major drainage catchments: Port Phillip and Western Port Bay. There are a number of valuable Melbourne Water managed waterways and drains in Casey that enter Port Phillip and Western Port Bay that include:» Dandenong Creek» Eumemmerring Creek» Cardinia Creek» Watson Inlets» Hallam Valley Main Drain» Eastern Contour Drain» Tooradin/Dalmore outfalls

Waterways provide significant recreational values and form corridors of important habitats. The health of the waterway depends on land use, urbanisation, population levels and soil type. There is an opportunity to improve the health of waterways in Casey that include Cardinia Creek and Langwarrin Creek.Casey’s map of waterways and catchment provide a snapshot of waterway condition.

The majority of Casey’s waterways are in poor condition except some sections of the Cardinia Creek and Langwarrin Creek that are in moderate condition.

Image: Private Jetty, Blind Bight – Peter Elgar


Catchment & Index Stream Condition

Legend

Cardinia Creek

Casey Boundary

UGB (Aug 2012)

Catchments

Index Stream Condition

Eastern Contour Drain

Eumemmerring Creek

Hallam Valley Contour Drain

Watson Inlet

Rating

Moderate

Poor

Very Poor

N/A

Dandenong Creek (Pillar’s Crossing/Police Rd)

07Casey’s Catchment and Waterways Catchment & Index Stream Condition

Image: Framed by Nature, River Gum Creek Reserve, Hampton Park – William Neilson

Household Water Saving AchievementsFrom the base year 2004/2005 to 2011/2012, the Casey community achieved a 22% reduction in residential household water use. Per capita residential use reduced from 177 L/day in 2004/2005 to 140 L/day in 2011/2012.

Nonresidential Water Saving Achievements Casey business and commercial properties have achieved 30% reduction in non-residential water use per property.

Casey’s Achievements

Water Saving Achievements

The City of Casey achieved its target to reduce per capita (measured against the population of the municipality) municipal potable water use of 15% by 2010.

Figure: Per capita reduction in residential water use*

250

200

150

100

50

02000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

Council’s Water Saving AchievementsThe City of Casey is committed to reducing drinking water consumption. Council achieved a 21% reduction in per capita water use from baseline year 2004/05. Council achieved this through water saving projects that include stormwater harvesting, demand management and retrofitting council facilities with water efficient appliances.

Figure: Per capita reduction in Council’s water use*

Miscellaneous (million litres/year)

Open Space (irrigation) million litres/ year

350

300

250

200

150

100

50

million litres/ year 2000/

20012001/2002

2002/2003

2003/2004

2004/2005

2005/2006

2006/2007

2007/2008

2008/2009

2009/2010

Buildings & other non irrigation demands (Million litres/year)

*data sourced from South East Water Ltd


Concept of Water-Sensitive Urban Design (WSUD)

Stormwater Quality Achievements

Water Sensitive Urban Design (WSUD) is a term for a range of stormwater water treatment measures. This is achieved by slowing down the water and treating pollutants prior to drainage entering the waterway.

Over the last decade the City of Casey in collaboration with Melbourne Water has made significant improvements to stormwater quality discharging into waterways. Jointly the City of Casey and Melbourne Water have constructed WSUD assets that achieved:

» 115% reduction in municipalities TSS loading (target 80%)

» 105% reduction in municipalities TP loading (target 45%)

» 72% reduction in municipalities TN loading (target 45%)

Constructed WSUD assets in the City of Casey exceed best practice as per the Best Practice Environmental Guidelines for Urban Stormwater (BPEM).

In Casey a large number of WSUD assets exceed best practice as per the Best Practice Environment Guidelines for Urban Stormwater (BPEM).

Image: Stormwater Harvesting System Construction at Grices Road, Berwick Image top: Raingarden Edwin Flack Reserve, Berwick Image bottom: City of Casey Works and Operation Centre Rainwater Harvesting Tanks

09Casey’s Achievements Stormwater Quality Achievements

Water in Casey – Current (2011/12)

Potable Drinking Water The City of Casey’s current drinking water demand is 16,393 million litres/year. A significant volume of the Cities drinking water is discharged as wastewater.

StormwaterThe Cities urban areas generate significant volume (76,442 million litres per year) of stormwater that enters into Port Phillip and Western Port Bay.

WastewaterRecycled water (treated wastewater) use in the City is significant and accounts for 16% of the total potable water demand in Casey.

The water balance shows all water that flows in – (potable, rainfall, recycled water and groundwater) and flows out (stormwater, infiltration and evaporation, wastewater) or gets re-used in the City of Casey.


Casey’s Stormwater – Current

At present the Council consumes 195 million litres per annum of potable (drinking) water. Council’s total water use is only one percent (1%) of the Cities total water use.

Figure: Breakdown of Council current water use

02

01

04

03 01 Recreational Reserve and Open Spaces 40%

04 Buildings and Facilities 14%

03 Miscellaneous 19%

Urban development increases flow volumes. While impervious areas represent only ten percent (10%) of the total surface area in the City, it generates a large volume of excess stormwater runoff. The majority of existing urban development in Casey currently drains into Port Phillip Bay.

Stormwater runoff generated from urban development carries pollutant such as sediments, litter, nutrients, organic matter, heavy metals and oils. These pollutants from hard paved surfaces can be detrimental to the health of waterways and the Bays.

At present the City of Casey has large areas of farmland that is rapidly converting to urban areas. Of the 40,072 ha of land within the City of Casey, 3,867 ha are impervious (hard) surfaces.

Council’s Current Water UseCouncil’s water use is only one percent of the Cities total water consumption. Council’s major water consumption is from recreational and leisure facilities, recreational reserves, open space and buildings.

02 Recreation Centre and Leisure Facilities 27%

Image: The Rise Wetlands

11Water in Casey Current

The City’s population is projected to reach 459,000 by 2036. Population growth and urbanisation will result in increased water demand and stormwater runoff.

Water in Casey – Future (2030)

Potable Drinking water In 2030 based on future population growth and climate change the City of Casey’s drinking water demand is projected to be 24,195 million litres per year. Alternative fit-for-purpose water can replace demand for precious drinking water.

Stormwater In 2030 due to population increase, and urban development the City of Casey is projected to generate 77,220 million litres per annum of stormwater runoff discharging into waterways and bays. The stormwater can potentially be reused for suitable purposes and reduce the adverse impact on waterways and bays.


Image: Sunset at Warneet North Jetty – Tracey Perrott

Casey’s Stormwater – Future

Casey’s future population growth and development leads to more impervious area. Additional stormwater places more pressure on Council-managed drains that discharge into Melbourne Water’s waterways in Casey.

Seventy-five percent (75%) of Casey’s future urban development is expected to occur within the Western Port catchment. The remaining twenty-five percent (25%) will occur in the Port Phillip Catchment.

Integrated Water Management can minimise the impact of the pollutants on the bays.

Council’s Future Water Use

Figure: Council’s projected future (2030) water use

Miscellaneous (Million litres/year)

Buildings and other non irrigation demands million litres/ year

Open Space (irrigation) million litres/ year

450

400

300

350

200

250

100

150

50

million litres/ year

Water use

2011/12 FUTURE (2030)

Council’s overall water use is expected to increase by 9.4 million litres (ML) per year and projected to reach 387 million litres (ML) in 2030. Irrigation demand accounts for 7.2 million litres per year or construction of 2–3 new sporting ovals per year.

13Water in Casey Future

TargetsTargets reflect Council’s commitment towards achieving the vision goal of being a Water Efficient City. Council has a leadership role to conserve water and manage water related assets.

Water Saving Target

Stormwater Quality Target

Council Water Saving Target » In 2031 Council’s potable

water use will be 269 million litres (a 30% reduction from Council’s projected 2030 potable water use).

Council’s Stormwater Quality TargetAttain best practice stormwater pollutant load reduction targets for urban areas:

» By 2025, all Council’s WSUD assets are maintained

» By 2025, all Council’s WSUD assets requiring renewal are renewed.

Community Water Saving Target » To encourage and assist the

community to reduce potable water use and cost through education and advocacy.

Image: Reeds, Centre Road, Narre Warren – Debbie Drury


Implementation Plan

Action items in the implementation plan will focus Council effort on:» Increase demand

management and alternative water supplies

» Pro-actively maintain and renew stormwater management assets and

» Advocate for an integrated approach to water management.

An implementation plan developed by Council details the structural and non-structural actions to be undertaken to achieve Council’s Integrated Water Management targets

The implementation plan action items will be reviewed annually in coordination of all key stakeholders.

15Casey’s Stormwater Targets

Roles and Responsibilities for Water Management

Table 1 Legislative framework for water management

Roles and Responsibility

The responsibility for integrated water management is shared by individuals, local government, water retailers and state government.

City of Casey (local Government)

Melbourne Water

South East Water

Southern Rural Water

Essential Services Commission (ESC)

Environmental Protection Authority (EPA)

STATE GOVERNMENT

DELWP – Department of Environment, Land , Water and Planning

CMA – Catchment Management Authorities

MPA – Metropolitan Planning Authority (previously known as GAA-Growth Area Authority)

Local drainage is a core responsibility for Council. Council is responsible for drainage in catchments less than 60 hectares. Council’s local drainage network directly discharges into Melbourne Water’s drainage system.

Council contributes to the development of local flood management plans and flood emergency management plans with Melbourne Water and Victorian State Emergency Services. Casey Planning Schemes incorporate flood provisions to control development and works on flood prone land.

Council is responsible for ensuring sustainable water management and the protection of waterways and bays. Council is required to manage and maintain assets it constructs and inherits from new development areas.

Council as a land use planning authority needs to ensure appropriate planning conditions are placed in a planning permit to ensure all new developments including new residential developments/ subdivisions comply with stormwater quality objectives, treat stormwater at source or contributes to a Melbourne Water Drainage Scheme.

Melbourne Water manages the water catchments (the dams), sewerage systems and treats the water to a high standard to supply drinking and recycled water and manage.

Melbourne Water is responsible for managing and maintaining the main trunk drainage system.

South East Water’s role is to ensure reliable supply of water and sewerage services.

Supply water for rural areas and manage associated infrastructure.

DEWLP is responsible for Statewide water resources policy and strategic planning, and recommendations to the minister regarding the allocation of bulk entitlements.

CMAs (together with Melbourne Water) effectively undertake the role of ‘caretaker of river health’ for their region. CMAs responsibility is to manage regional waterway, floodplain, drainage and environmental water reserve. CMA prepares regional catchment management plans.

MPA’s role is to provide guidance and influence enhanced water management into precinct structure plans for growth areas.

ESC’s responsibility is to undertake price determination and service standards monitoring for supply of water, sewerage and drainage services.

EPA administers the Environment Protection Act 1970 and issues work approval and licenses under the Environment Protection Act 1970 to existing industry or new scheduled premises discharging waste to the environment.

Table-1: The table below presents the legislative frameworks and Council policies guiding for the roles and responsibilities of water management.

Organisations


Legislative Frameworks Council Policy

Water Act, 1989

Local Government Act (1989)

State Environment Protection Policies (SEPP) 2003 and Planning and Environment Act (1987)

Urban Stormwater-Best Practice Environmental Management Guidelines Best Practice Environmental Management Guideline(1999) and Clause 56.07 of the Victorian Planning Provisions

City of Casey’s Municipal Strategic Statement (MSS)

Stormwater Management Plan (2004)

Asset Management Improvement Strategy

Casey C21

Council Plan

Sustainable Water Use Plan (2006)

City of Casey’s Municipal Strategic Statement (MSS)

Water Act, 1989

Water Act, 1989

Water Act, 1989

Water Act, 1989

Water Act, 1989 and Statements of Obligations issued by the Minister for Water

Environment Protection Act 1970

Image: Warneet foreshore, Tooradin Foreshore, Tooradin – Ewan Arnolda

17Roles and Responsibilities Framework for water management

Notes


19City of Casey Notes

Contact City of Casey 03 9705 5200NRS: 133 677 (for the deaf, hearing or speech impaired) TIS: 131 450 (Translating and Interpreting Service)[email protected] Box 1000Narre Warren VIC 3805

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City of Casey Integrated Water Management Plan...Contents Vision 03 What is a Water Efficient City? 03 Values 04 Integrated Water Management 04 Council Water Plans and Strategies 05

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