C E N T R a L R E G Io N S U S T a in a B L E W a T E R S T R a T E G Y

Total Page:16

File Type:pdf, Size:1020Kb

C E N T R a L R E G Io N S U S T a in a B L E W a T E R S T R a T E G Y 22 CENTRAL REGION SUSTAINABLE WATER STRATEGY / CHAPTER 1 River and Aquifer Health Rivers naturally have variable flow regimes reflecting the rainfall and Importance of flow for rivers run-off within their catchments. This includes low flows during summer European settlement and the associated landscape changes together with small freshening flows occurring periodically and higher winter with our reliance on rivers for water supply in the Central Region has flows including bank-full flows and floods of adjacent land. Each of taken its toll and some are in poor or very poor condition. Some of these components of the flow regime plays an important role in the these rivers are heavily utilised for consumptive purposes and in some ecology of the river, see Figure 3.1. For example, high flows stimulate cases have only about half of their natural flows, which becomes even fish breeding and maintain estuary openings. Similarly, groundwater less in drought years. Some of the catchments that these rivers flow can provide base flows in summer to maintain fish refuges. Floods in through are greatly modified by a combination of water extraction spring regenerate floodplains and wetlands, and replenish the river urbanisation, clearing of native vegetation, draining of wetlands and channel. Water extraction can change these crucial flow components pollution from adjacent land. with negative effects on the ecology of the system. Several rivers in the Central Region are not so heavily used and still retain 70% to 90% of their natural flows (see table 3.1). However, even in these rivers, this is no guarantee of environmental health. In many cases, these rivers are showing signs of environmental damage due to major changes in the pattern of flows (i.e. flow regime) and/or broader catchment changes. Figure 3.1 Importance of the pattern of flow to the health of a river Freshes Bankfull Overbank Flow Help Maintain or improve water qaulity Helps with sediment movement and channel maintenance Maintains floodplain and wetland connectivity ������������������� ������������� �� �� �� �������� �� �� ��������� 3 CHAPTER ������� �� �� ������ �������� ������� �� � ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� Low Flow Cease to Flow High Flow Connects inter-stream habitats Dries out habitats - important for some ecological processes. Allows for fish migration. Low Flow Cease to Flow High Flow CENTRAL REGION SUSTAINABLE WATER STRATEGY / STRATEGY WATER CENTRALSUSTAINABLE REGION 23 In undertaking these scientific studies, some of the constraints under Assessing the flow needs of our rivers which these river systems operate are built into the final environmental In 2002, the Victorian Government commissioned a review of flow recommendations. For example, overbank flooding is not environmental flow assessment methodologies across the world to included in the Lower Yarra, Werribee, Barwon and Maribyrnong rivers develop a ‘best practice’ that could be applied to Victorian rivers. The because of urban development on these floodplains. resultant approach – the FLOWS method - is now the standard in Victoria Table 3.2 provides estimates of the additional volume of water required for assessing the flow needs of rivers in water allocation decisions. to meet the full environmental flow recommendations for each of the The FLOWS method is applied to rivers where further water extraction key rivers in the Central Region. These have been calculated under is being considered to determine whether and how much additional full use of consumptive entitlements and current operating and water water can be taken without further environmental damage. It is also harvesting rules. applied to rivers identified as flow-stressed in regional river health This confirms that many rivers in the Central Region are flow stressed, strategies to identify how much additional water is required to sustain which is impacting on their environmental condition. Decisions on the environmental values of the river. These regional river health whether to return water to these rivers and how much, will take into strategies have been prepared by catchment management authorities account environmental benefits, the impacts on consumptive users in consultation with their broader communities. and any other costs. Scientific studies using the FLOWS method have now been Appendix 3 provides a detailed reach-by-reach breakdown for each completed for all the key rivers in the Central Region (see Table 3.1), river, of the compliance with the flow regime under full consumptive except for the Tarago River, which will be completed later this year. use with the scientific recommendations (SKM 2005). In the FLOWS method, teams of independent scientists determine the flow components required to maintain and where necessary, enhance environmental values with a high probability of success. As part of the process, community advisory groups are established for each river to provide local knowledge and advice, particularly on environmental objectives and values. The Government acknowledges the extensive time, effort and valuable input these groups have put into each study. Table 3.1 Independent scientific studies on environmental water requirements completed for rivers in the Central Region River Scientific Environmental Flow Studies Gellibrand Assessment of Environmental Flow Requirements for the Gellibrand River, Draft Recommendations Revision B, Earthtech, January 2006. Barwon/Leigh Environmental Flow Determination for the Barwon River: Final Report – Flow Recommendations, Lloyd Environmental Pty Ltd, Ecological Associates Pty Ltd, and Fluvial Systems Pty Ltd, October 2005 Moorabool An Assessment of Water Use and Environmental Flow Requirements for the Moorabool River - Moorabool River Water Resource Assessment. Sinclair Knight Merz, 2004 Werribee The Environmental Water Needs of the Werribee River: Final Report – Flow Recommendations, Ecological Associates Report BN001-3D, September CHAPTER 3 CHAPTER 2005 Maribyrnong Assessment of Environmental Flow Requirements for the Maribyrnong River, Final Recommendations – Draft for comment, Revision B, Earthtech, January 2006 Yarra Determination of the Minimum Environmental Water Requirements for the Yarra River, Final, Sinclair Knight Merz, December 2005 Latrobe Assessment of Environmental Flow Requirements for the Latrobe River, Final Recommendations Revision C1, Earthtech, January 2006 Thomson/Macalister Environmental Flow Options for the Thomson and Macalister Rivers, Final Report - Conclusions and Recommendations. The Thomson Macalister Environmental Flows Task Force February 2004 Gippsland Lakes Gippsland Lakes Environmental Study: Assessing options for improving water quality and ecological function, CSIRO, South Australia, 2001 CENTRAL REGION SUSTAINABLE WATER STRATEGY / STRATEGY WATER CENTRALSUSTAINABLE REGION 24 Table 3.2 Estimated addition required to the environmental flow regime10 to meet all the recommendations determined in the independent scientific studies River Estimated addition (ML/year) 1 Yarra 20,000 Werribee 14,500 Maribyrnong 6,900 Bunyip/Tarago To be determined Latrobe To be confirmed 2 Thomson/Macalister 47,000 Barwon/Leigh 4,700 Moorabool 20,000 Gellibrand n/a as current flows are sufficient Total 113,100 1. These estimates are on the basis of the full use of entitlements and are long-term average flows. This is an approximation only assuming current operating and harvesting rules remain unchanged. It is subject to further refinement over time as our understanding of delivering environmental water reserves improves 2. This is to be confirmed pending the outcomes of a review of the environmental flow study by the Technical Audit Panel Outlined below are the key findings from each environmental flow riparian vegetation is encroaching on the river channel. Reduced study and a summary of how well the full scientific recommendations freshes are affecting water quality and cause sediment to build u determined in the studies compare with the flow regime associated in the pools. Lack of overbank flow means that wetlands (eg Banyule with full use of consumptive entitlements. Complete environmental wetlands) are now watered less often. However, it is recognised that flow study reports are available at www.dse.vic.gov.au/riverhealth/ reinstating overbank flows, including the lower Yarra floodplain, would not be desirable due to impacts on urban centres. It may be possible Yarra River to undertake works to provide water to specific wetlands. The Yarra River is an icon with high conservation, social and economic The Yarra estuary, although highly modified, plays a critical part in the values. A combination of flow and non-flow related issues influence river’s health. A number of native fish species, including the threatened the condition of the Yarra River and its tributaries. While the overall Australian grayling, need to migrate between fresh and estuarine or condition through the upper and mid reaches remains good, some marine waters as part of their life-cycle. Processes occurring in the elements of the flow regime under full use of consumptive entitlements estuary are strongly linked to interactions between freshwater inflows are insufficient to support important environmental values. For the from the Yarra River and tidal movement. most part, this is related to a reduction in the number and duration In general, maintaining the existing flow regime, with some of fresh and high flow events that would provide cues for Australian improvements to the low flows and
Recommended publications
  • Action Statement No.134
    Action statement No.134 Flora and Fauna Guarantee Act 1988 Yarra Pygmy Perch Nannoperca obscura © The State of Victoria Department of Environment, Land, Water and Planning 2015 This work is licensed under a Creative Commons Attribution 4.0 International licence. You are free to re-use the work under that licence, on the condition that you credit the State of Victoria as author. The licence does not apply to any images, photographs or branding, including the Victorian Coat of Arms, the Victorian Government logo and the Department of Environment, Land, Water and Planning (DELWP) logo. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ Cover photo: Tarmo Raadik Compiled by: Daniel Stoessel ISBN: 978-1-74146-670-6 (pdf) Disclaimer This publication may be of assistance to you but the State of Victoria and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication. Accessibility If you would like to receive this publication in an alternative format, please telephone the DELWP Customer Service Centre on 136 186, email [email protected], or via the National Relay Service on 133 677, email www.relayservice.com.au. This document is also available on the internet at www.delwp.vic.gov.au Action Statement No. 134 Yarra Pygmy Perch Nannoperca obscura Description The Yarra Pygmy Perch (Nannoperca obscura) fragmented and characterised by moderate levels is a small perch-like member of the family of genetic differentiation between sites, implying Percichthyidae that attains a total length of 75 mm poor dispersal ability (Hammer et al.
    [Show full text]
  • 2Protecting Our Rivers and Aquifers
    1 The Strategy at a Regional Level Chapter Two 2 Protecting our Rivers and Aquifers This chapter outlines the Government’s action plan to protect and improve the health of rivers, estuaries and aquifers. The initiatives apply to the whole Central Region. Local actions are outlined in Chapter 4. In protecting and improving the health of the region’s rivers, it is essential to: • preserve the environment’s existing share of water • use this existing water for the environment more efficiently • increase the amount of water for the environment where it is not sufficient • undertake complementary works (such as revegetation of the streamside zone) to maximise the river health benefits of increasing environmental flows • manage the impacts of low inflows and climate change. Protecting our rivers The Government is committed to improving the health of Victoria’s There are many Aboriginal and other sites of significance associated rivers, floodplains and estuaries. These natural assets support with rivers and creeks. Aboriginal people have a strong social, cultural industry, tourism and recreation, and are highly valued by people and spiritual connection to the land and water. This Strategy, together who live and work around them. with the Regional River Health Strategies, will assist in ensuring that Protecting the health of our rivers ensures that the drinking rich Aboriginal heritage values will be protected and interpreted to water we extract from them is of a high quality. allow others to understand the Aboriginal communities’ significant cultural connection between land and water. The Regional River Rivers are also highly significant ecosystems in their own right.
    [Show full text]
  • Moorabool River Environmental Water Management Plan
    Moorabool River Environmental Water Management Plan Draft Version 2.3 Document Control details Name: Details: Date: Version: Saul Vermeeren Submission of draft 7 December 2015 2.1 EWMP to DEWLP Saul Vermeeren CCMA internal review 8 January 2016 2.2 Saul Vermeeren Submission of draft 12 January 2016 2.3 EWMP to MSAC Acknowledgments Acknowledgement of Country The Corangamite CMA acknowledges the traditional custodians of the land and waters where we work, and pay our respects to the Elders past and present. The aboriginal Traditional Owners have existed as part of the land for thousands of generations and have an intrinsic connection to the land, the rivers and the sea. The Corangamite CMA recognises and acknowledges the contribution and interest of Aboriginal people and organisations in waterway and land management. Contributions to the Moorabool EWMP The Corangamite Catchment Management Authority would like to acknowledge the input of our partner agencies and communities. In particular, the authority would like to acknowledge the contributions of the Moorabool Stakeholder Advisory Committee and the time and expertise that was committed by individual members. The Moorabool Stakeholder Advisory Committee in action on the Moorabool River in 2014 (Photo Rachael Roger) Contents Acknowledgments ............................................................................................................................................... iii 1 Introduction ............................................................................................
    [Show full text]
  • Central Region
    Section 3 Central Region 49 3.1 Central Region overview .................................................................................................... 51 3.2 Yarra system ....................................................................................................................... 53 3.3 Tarago system .................................................................................................................... 58 3.4 Maribyrnong system .......................................................................................................... 62 3.5 Werribee system ................................................................................................................. 66 3.6 Moorabool system .............................................................................................................. 72 3.7 Barwon system ................................................................................................................... 77 3.7.1 Upper Barwon River ............................................................................................... 77 3.7.2 Lower Barwon wetlands ........................................................................................ 77 50 3.1 Central Region overview 3.1 Central Region overview There are six systems that can receive environmental water in the Central Region: the Yarra and Tarago systems in the east and the Werribee, Maribyrnong, Moorabool and Barwon systems in the west. The landscape Community considerations The Yarra River flows west from the Yarra Ranges
    [Show full text]
  • Barwon-Darling River System
    Assessment of environmental water requirements for the Northern Basin review: Barwon-Darling river system DRAFT ''Near to final' draft for independent review - 2 May 2016 'Near to final' draft for independent review - 2 May 2016 Executive summary The Basin Plan provides a framework for the management of the water resources of the Murray- Darling Basin. The objectives of the Basin Plan include to protect and restore water-dependent ecosystems and functions, with the aim of achieving a healthy working Murray-Darling Basin. Prior to the making of the Basin Plan in 2012, the environmental water requirements of 24 large environmental assets (known as umbrella environmental assets) across the Murray-Darling Basin were assessed. These assessments, along with information from other disciplines, were used as part of the implementation of the peer reviewed Environmentally Sustainable Level of Take method to inform the setting of long-term average Sustainable Diversion Limits in the Basin Plan. At the time of the making of the Basin Plan, it was decided that there would be a review into aspects of the Basin Plan in the northern Basin. The Northern Basin review includes research and investigations in social and economic analysis, hydrological modelling, and environmental science, supported by stakeholder engagement. The review is re-applying the established Environmentally Sustainable Level of Take method. This review has gathered new data and knowledge from a range of disciplines including environmental science. The review may lead to the re-setting of the Sustainable Diversion Limits for the northern Basin. The environmental science program within the Northern Basin review focused on relationships between river flows and the ecological responses of key flora and fauna (particularly fish and waterbirds) as well as broader ecological functions.
    [Show full text]
  • Water Allocation Trading Strategy 2019-20
    Water allocation trading strategy 2019-20 June 2019 Final Version collaboration integrity commitment initiative Disclaimer This publication may be of assistance to you but the VEWH and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication. Accessibility If you would like to receive this publication in an alternative format, please contact the VEWH on 03 9637 8951 or email [email protected]. This document is also available on the internet at www.vewh.vic.gov.au. Acknowledgement of Traditional Owners The VEWH proudly acknowledges Victoria’s Aboriginal communities and their rich culture and pays respect to their Elders past and present. We acknowledge Aboriginal people as Australia’s first peoples and as Traditional Owners and custodians of the land and water on which we rely. We recognise the intrinsic connection of Traditional Owners to Country, and we value their ongoing contribution to managing Victoria’s landscapes. We also recognise and value the contribution of Aboriginal people and communities to Victorian life and how this enriches us. The VEWH recognises the intersection between environmental flow objectives and outcomes for Traditional Owners and Aboriginal Victorians. We acknowledge the ongoing contribution that Aboriginal people are making to planning and managing water for the environment and the benefits that have resulted from these partnerships. The contribution of Traditional Owners to this year’s seasonal watering plan is detailed in the regional introductions.
    [Show full text]
  • Risk-Based Assessment of Ecosystem Protection in Ambient Waters
    GUIDELINE FOR ENVIRONMENTAL MANAGEMENT RISK-BASED ASSESSMENT OF ECOSYSTEM PROTECTION IN AMBIENT WATERS GUIDELINE FOR ENVIRONMENTAL MANAGEMENT RISK-BASED ASSESSMENT OF ECOSYSTEM PROTECTION IN AMBIENT WATERS EPA Victoria 40 City Road, Southbank Victoria 3006 AUSTRALIA October 2004 Publication 961 ISBN 0 7306 7644 7 © EPA Victoria, 2004 The delivery of this guideline was assisted by funding from the joint Commonwealth and State partnership for the National Action Plan for Salinity and Water Quality and also the collaboration of North Central and Corangamite Catchment Management Authorities on the guideline case studies. Foreword State environment protection policies (SEPPs) aim to safeguard the environment. Policies express the community’s expectations, needs and priorities for using and protecting the environment. The SEPP (Waters of Victoria) (WoV) has provided significant steps forward in the management and protection of our aquatic ecosystems. A key part of this is the adoption of a risk-based approach to the policy environmental quality objectives. This is a relatively new approach reflecting current scientific knowledge and direction. The increasing adoption of risk-based methods by environmental agencies and resource managers has evolved from the need to develop transparent processes that better deal with the complexity and variability of aquatic ecosystems. This guideline has been produced to provide support to catchment management authorities, coastal boards, water authorities and other resource managers in the implementation of
    [Show full text]
  • Electoral Roll Rusheen Craig 2006 1 Contents 1869-70 Balranald Sub-Division
    Rusheen’s Website: www.rusheensweb.com 1869-70 Balranald Electoral District Roll. Subdivisions of Balranald, Bourke, Mitchell (Wilcannia area), Oxley (Hay area), Wentworth, and the Supplementary Roll for The Bogan. Persons eligible to vote in the Electoral District of Balranald 1869-70. No. Name - Residence; Qualification; Where Situated or how arising. Transcribed by RUSHEEN CRAIG May 2006. Last updated: 14 March 2013 ________________________________________________________________________________________________ Balranald Electoral Roll Rusheen Craig 2006 1 Contents 1869-70 Balranald Sub-division. .............................................................................................................................3 1869-70 Bourke Sub-division. .................................................................................................................................7 1869-70 Mitchell Sub-division [includes Wilcannia and Menindie]. .................................................................. 10 1869-70 Oxley Sub-division (Hay area). ............................................................................................................... 18 1869-70 Wentworth Sub-division. ....................................................................................................................... 32 1869-70 Supplementary Roll for The Bogan......................................................................................................... 41 ________________________________________________________________________________________________
    [Show full text]
  • Friends of the Barwon Inc
    Submission to Victoria’s Draft 30-Year Infrastructure Strategy Volume 1-1 23 January 2021 Friends of the Barwon Inc. (FOTB) represents a group of concerned citizens. The organisation was incorporated in 2019, to advocate for the protection and improvement of the ecosystem of the Barwon Basin, including the Yarrowee-Leigh and Moorabool Rivers. FOTB has over 200 members, has received financial, in-kind and moral support from a number of organisations, including: Shires of Colac-Otway and Surf Coast; Barwon Water; Corangamite Catchment Management Authority; Southern Rural Water and a large number of community organisations with connections to the Barwon, Moorabool, and Yarrowee-Leigh river basins. At its launch in July 2019, some 150 people attended, including senior representatives of the Minister for Water, G21, City of Greater Geelong, Barwon Water, Corangamite Catchment Management Authority and several shires. Further details can be found at https://friendsofthebarwon.org.au Contact Details: 1 | P a g e Managing for change in the Barwon Catchment We are pleased to respond to Infrastructure Victoria’s invitation to comment on its draft 30-year strategy, particularly pertaining to the Barwon region. Victoria’s two major regional centres of Geelong and Ballarat are the focus of this submission. In particular we will suggest that the major waterways, namely the Barwon/Moorabool and the Yarrowee/Leigh Rivers, flowing through these two cities respectively, are a logical option to create a network of environmental infrastructure throughout these cities and beyond. We will submit that such environmental infrastructure is an important opportunity currently overlooked in the draft 30- year infrastructure strategy.
    [Show full text]
  • Drought Impact on Fish Communities and River Health in the Corangamite Region
    Drought impact on fish communities and river health in the Corangamite Region An isolated pool in Painkalac Creek. Tom Ryan and John McGuckin Report prepared for Corangamite Catchment Management Authority August 2007 Drought impact on fish communities and river health in the Corangamite Region Executive Summary This study provides a rapid assessment of river condition and aims to determine the key issues affecting aquatic health including the relative impact of drought. It is designed to help prioritise potential management actions in the drought response plan. Pre-existing catchment issues, such as water extraction, extensive land clearing and lack of riparian vegetation can directly affect river health and compounds impacts caused directly by drought. Where catchments have been degraded by past management practices, the severity of the drought upon stream health has been the most extreme. Waters examined in this study have been classified into 3 distinct classes of river health, streams with minor stress, streams with moderate stress and streams that have severe stress. Waterways with minor drought stress had lower streamflows than normal as a result of the drought but were in no immediate threat of becoming severely stressed by the drought. Waters classified as having moderate stress are ones in which the existing aquatic fauna is expected to be experiencing some stress, however, the stress is unlikely to have caused the loss of species. Streamflow may have ceased in freshwater reaches and water deterioration may have occurred in remaining refuge habitat, however, the duration of the stress upon aquatic fauna has only been for a relatively short period.
    [Show full text]
  • Seasonal Watering Plan 2014-15 Collaboration Integrity Commitment Initiative
    Victorian Environmental Water Holder Seasonal Watering Plan 2014-15 collaboration integrity commitment initiative © Victorian Environmental Water Holder 2014 Accessibility If you would like to receive this publication in an This work is licensed under a Creative Commons Attribution alternative format, please contact the Victorian 3.0 Australia licence. You are free to re-use the work under Environmental Water Holder on (03) 9637 8951 or email that licence, on the condition that you credit the Victorian [email protected]. This document is also Environmental Water Holder as author. The licence does not available on the internet at www.vewh.vic.gov.au apply to any images, photographs or branding, including the Victorian Government logo and the Victorian Environmental Acknowledgment of Country Water Holder logo. To view a copy of this licence, visit The Victorian Environmental Water Holder acknowledges http://creativecommons.org/licenses/by/3.0/au/deed.en Aboriginal Traditional Owners within Victoria, their rich culture and their spiritual connection to Country. The Printed by Impact Digital, Brunswick (June 2014) contribution and interests of Aboriginal People and organisations in the management of land and natural ISSN: 2203-6539 (Print) resources is also recognised and acknowledged. ISSN: 2203-6520 (Online) Disclaimer This publication may be of assistance to you but the Victorian Environmental Water Holder and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication.
    [Show full text]
  • References (PDF
    References Aldrick JM 1976. Soils of the Alligator Rivers area. In Lands of the Alligator Rivers Area, Northern Territory, Story R, Galloway RW, McAlpine JR, Aldrick JM & Williams MAJ, CSIRO Land Research Series 38, Melbourne, 71–88. Allen JRL 1985. Principles of physical sedimentology. George Allen & Unwin, London. Andrus CW, Long BA & Froehlich HA 1988. Woody debris and its contribution to pool formation in a coastal stream 50 years after logging. Canadian Journal of Fisheries and Aquatic Science 45, 2080–2086. Bettenay E, Russell WGR & Mann AW 1981. A description of the regolith at Jabiluka, Northern Territory. Land Resources Management Technical Paper 9, CSIRO, Melbourne. Boggs G, Devonport C & Evans K 1999. Application of geographic information systems to the assessment and management of mining impact: A project outline. Internal Report 320, Supervising Scientist, Canberra. Unpublished paper. Brush LM Jr, Einstein HA, Simons DB, Vanoni VA & Kennedy JF 1966. Nomenclature for bed forms in alluvial channels. Journal of the Hydraulics Division, Proceedings of the American Society of Civil Engineers 92 (HY3), 51–64. Brush LM Jr & Wolman MG 1960. Knickpoint behaviour in noncohesive material: a laboratory study. Geological Society of America Bulletin 71, 59–74. Bureau of Meteorology 1999. Hydrometeorological analyses relevant to Jabiluka. Supervising Scientist Report 140, Supervising Scientist, Canberra. Carey WP 1984. A field technique for weighing bedload samples. Water Resources Bulletin 20, 261–265. Carey WP 1985. Variability in measured bedload-transport rates. Water Resources Bulletin 21, 39–48. Chiew FHS & Wang QJ 1999. Hydrological analysis relevant to surface water storage at Jabiluka. Supervising Scientist Report 142, Supervising Scientist, Canberra.
    [Show full text]