Central Highlands Water
Contents
1.0 Customer and Community Summary 5
2.0 Introduction 9 2.1 Summary of the 2019/20 Season 9 2.2 Forward Outlook (2020/21) 10 2.3 Forecast Assumptions - Likelihood Rating 11 2.4 Other considerations 11 2.5 Action Plans 11 2.6 Explanation of Terms 11
3.0 Climate Outlook 12
4.0 Water Resource Actions 16
5.0 Amphitheatre 21 5.1 Storage Forecast 21 5.2 Forecast Considerations 21 5.3 Overview of System Status 21 5.4 Bulk Water Demand 22 5.5 Action Plan - Amphitheatre 23
6.0 Avoca 24 6.1 Groundwater Levels 24 6.2 Forecast Considerations 24 6.3 Overview of System Status 24 6.4 Bulk Water Demand 25 6.5 Action Plan Update - Avoca 26
7.0 Ballarat 27 7.1 Storage Forecast 27 7.2 Forecast Assumptions 27 7.3 Overview of System Status 27 7.4 Bulk Water Demand 28 7.5 Action Plan – Ballarat and District 29 Document title: 2020 Water Outlook Version : Final Author: Pat Russell Doc code:BI/20/77966
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8.0 Beaufort 31 8.1 Storage Forecast 31 8.2 Forecast Assumptions 31 8.3 Overview of System Status 31 8.4 Bulk Water Demand 32 8.5 Action Plan - Beaufort 33
9.0 Blackwood 34 9.1 Storage Forecast 34 9.2 Forecast Assumptions 34 9.3 Overview of System Status 34 9.4 Bulk Water Demand 35 9.5 Action Plan - Blackwood 36
10.0 Clunes 37 10.1 Groundwater Levels 37 10.2 Forecast Considerations 37 10.3 Overview of System Status 37 10.4 Bulk Water Demand 38 10.5 Action Plan - Clunes 39
11.0 Daylesford 40 11.1 Storage Forecast 40 11.2 Forecast Assumptions 40 11.3 Overview of System Status 40 11.4 Bulk Water Demand - Daylesford 41 11.5 Action Plan - Daylesford 42
12.0 Dean 44 12.1 Groundwater Levels 44 12.2 Forecast Considerations 44 12.3 Overview of System Status 44 12.4 Bulk Water Demand 45 12.5 Action Plan - Dean 46
13.0 Forest Hill 47
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13.1 Groundwater Levels 47 13.2 Forecast Considerations 47 13.3 Overview of System Status 48 13.4 Bulk Water Demand 48 13.5 Action Plan – Forest Hill 49
14.0 Landsborough 50 14.1 Groundwater Levels 50 14.2 Forecast Considerations 50 14.3 Overview of System Status 50 14.4 Bulk Water Demand 51 14.5 Action Plan - Landsborough 52
15.0 Learmonth 53 15.1 Groundwater Levels 53 15.2 Forecast Considerations 53 15.3 Overview of System Status 53 15.4 Bulk Water Demand 54 15.5 Action Plan - Learmonth 55
16.0 Lexton 56 16.1 Groundwater Levels 56 16.2 Forecast Considerations 56 16.3 Overview of System Status 56 16.4 Bulk Water Demand 57 16.5 Action Plan - Lexton 58
17.0 Maryborough 59 17.1 Storage Forecast 59 17.2 Forecast Assumptions 59 17.3 Overview of System Status 59 17.4 Bulk Water Demand 60 17.5 Action Plan - Maryborough 61
18.0 Redbank 63 18.1 Groundwater Levels 63 18.2 Forecast Considerations 63 Document title: 2020 Water Outlook Version : Final Author: Pat Russell Doc code:BI/20/77966
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18.3 Overview of System Status 63 18.4 Bulk Water Demand 64 18.5 Action Plan- Redbank 65
19.0 Waubra 66 19.1 Groundwater Levels 66 19.2 Forecast Considerations 66 19.3 Overview of System Status 66 19.4 Bulk Water Demand 67 19.5 Action Plan - Waubra 68
Cover photos
Main image: White Swan Reservoir Small images (L-R): Tullaroop Reservoir, CHW Maintenance Team member (photo taken in 2018), Lal Lal Reservoir Spillway
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1.0 Customer and Community Summary For the benefit of Central Highlands Water’s (CHW) customer base and the broader community this summary provides an overview of the status of water supply resources in our region and what can be expected in the 12 month outlook period. Specific details on each system, the climatic forecast information as well as progress on water security related actions is contained within the remainder of the report. This Annual Water Outlook complements CHW’s Urban Water Strategy (CHW 2017) which covers longer term planning for its water supply systems and can be found on the link below http://www.chw.net.au/sites/default/files/documents/chw_2017_uws_-_main_report_appendices_-_final_- _revision_3_-_01_sept_.pdf Central Highlands Water operates 15 separate water supply systems across the Central Highlands Region Service Area as illustrated below.
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At the time of preparing this report the Bureau of Meteorology Climate Outlooks are indicating a 60-65% chance of above median rainfall for the October 2020 to December 2020 period across the CHW region. The Bureau of Meteorology also produce streamflow projections at some stream flow gauging sites. Streamflow projections generally favour near median flows: approximately 45% chance of median flows in the Lerderderg, and 47% in the Barwon Catchment and 49% chance of median flows at Tullaroop.
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CHW water supply resources are in a good position leading into the start of the 2020/21 summer period. The generally wet seasonal climate outlooks suggest that reservoir drawdown will be in the lower range of the modelled scenarios. No water restrictions are expected across the 15 separate water supply systems in the 12 month outlook period based on current levels of supply, forecast climatic conditions and assumed water usage demand. Further details are outlined as follows;
Current Water Supply Average Current Expected Primary Source System Number of Annual Supply Status in Population of Supply during (communities connections Demand Status the Outlook Outlook Period supplied) (ML per (27/10/2020) period annum)+ Amphitheatre Storage at Permanent Reservoir and 68% of Water groundwater capacity Saving Amphitheatre 76 125 14 Rules (PWSR*)
Bung Bong Bore Bore levels PWSR in normal Avoca 667 1098 131 range – full groundwater entitlement White Swan Local system PWSR Ballarat 54,304 119,844 12,702 Reservoir & at 96% of
Lal Lal Reservoir capacity Musical Gully System at PWSR Beaufort 833 1370 160 Reservoir 100% of
capacity Blackwood Basins System at PWSR Blackwood 341 373 38 100% of capacity Tourello Bores Bore levels PWSR in normal Clunes 946 1,679 218 range – full groundwater entitlement Wombat, Hepburn System at PWSR & Bullarto 100% of Daylesford 2,889 3,805 670 Reservoir(s) & capacity Coomoora Bore
Dean Bore Bore levels PWSR in normal Dean 21 45 13 range – full groundwater entitlement Forest Hill Bores Bore levels PWSR below long term normal range – Forest Hill 498 993 155 currently the
allocation is at 75% of groundwater entitlement Landsborough Navarre Bore Bore levels PWSR 144 243 27 in normal
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Current Water Supply Average Current Expected Primary Source System Number of Annual Supply Status in Population of Supply during (communities connections Demand Status the Outlook Outlook Period supplied) (ML per (27/10/2020) period annum)+ range – full groundwater entitlement Bankin Hill Bores Bore levels PWSR in normal Learmonth 102 281 48 range – full groundwater entitlement Gordon Hill Bore Bore levels PWSR in normal Lexton 154 197 26 range – full groundwater entitlement Centenary Local PWSR Reservoir, storages at Tullaroop 79% of Reservoir, capacity, Maryborough 5,894 11,231 1,401 Evansford Tullaroop Reservoir & allocation Moolort Bores 77%, full groundwater entitlement Redbank Bores Bore levels PWSR in normal Redbank 43 63 5 range – full groundwater entitlement Waubra Bores Bore levels PWSR in normal Waubra 110 192 29 range – full groundwater entitlement
Note:+ average of past 5 years * PWSR – The Victorian Government's permanent water saving (or use) rules are a set of common-sense rules to reduce demand and make sure we use water efficiently. For further details refer to https://www.water.vic.gov.au/liveable-cities-and-towns/permanent-water- saving-rules This report responds to our commitment to our customers and community to publish annual water security outlooks by the 1st of December each year that provides water resource levels and outlooks across all 15 water supply systems. Refer to our Let’s Talk Water report for more details (http://www.chw.net.au/sites/default/files/documents/chw_letstalkwater_2018- 2023.pdf) The report also meets the requirements of the State Government for individual water corporations to prepare an annual water security outlook and make this information publicly available. CHW also produces a Water Resources Summary which provides a more holistic summary of water resource issues and planning across the CHW region.
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2.0 Introduction The development of the CHW Urban Water Strategy (UWS) in 2017 for our 15 water supply systems detailed our commitment to efficient urban water use and identifying options to maintain a balance between urban water supply and demand over the next 50 years. While the UWS is concerned primarily with long term considerations, two other important documents: the Drought Preparedness Plan and the Annual Water Outlook (this report) provide short term planning and response actions. The purpose of this Water Outlook is to provide an update on the status of each system as of November 2020 and provide a 12 month outlook on expected supply and demand system performance. The highly variable nature of the Australian climate necessitates an adaptive approach to water resource planning of which these annual updates form an important part. The reader should also refer to the Drought Preparedness Plan which provides details of how CHW will respond to drought in the event that these actions are required. The outlooks are aligned with the DELWP Guidelines for the preparation of the Urban Water Strategy and CHW’s Let’s Talk Water commitments to our customers.
2.1 Summary of the 2019-2020 Season
The 2019-2020 summer was relatively dry and hot, although fortunately there were no major bushfires in the CHW region. Overall system consumption was somewhat higher than previous years and some high demand sequences were seen in hot summer spells. Rainfall in the winter and spring just passed has been high which has meant that all systems have tracked to the high side of the percentile performance projections and are now generally near capacity. No specific water resource shortage related actions were required.
The table below shows the recorded rainfall across the Central Highlands region as a percentage of the long-term average.
Past 12 Months % of long-term average Region (end of September 2020) Ballarat 680 mm 78% Daylesford 812 mm 93% Beaufort 639 mm 94% Maryborough 445 mm 85%
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For groundwater systems the impact of rainfall is more buffered than for the surface systems but current monitoring in CHW bores indicates that groundwater levels stayed in the normal range, except for Forest Hill, where levels were low and only 75% allocation was provided. Despite the low Forest Hill allocation there were no impacts on urban water supplies.
Demand decreased some 6% compared to 2018/19 with the distribution between different users throughout the year as illustrated below.
Note non potable consumption was less than 1%
2.2 Forward Outlook (2020/21)
Two types of outlook are provided: • For surface water supplied systems, a one year outlook from November 2020 for reservoir levels is provided. These are computed for: very rare, rare, unlikely and possible conditions based on statistical analysis of recorded inflows to the system. These outlooks are based on system models with appropriate adjustment of early records for climate change where applicable. Details of current resource level at the time of preparing this report are incorporated in Section 1 (Customer and Community Overview).
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• For groundwater supplied systems the recorded groundwater levels over the recent past provide a good indication of how levels may track and whether any resource issues are expected.
2.3 Forecast Assumptions - Likelihood Rating
Likelihood Rating Description Application * very rare Event will occur only in Worst sequence of historical extraordinary circumstances record (approximately 1 year in 100 on average) rare Event will occur only in A season which occurs 5 exceptional circumstances years out of 100 on average unlikely Event could occur at some A season which occurs 10 time years out of 100 on average possible Event might occur A season which occurs 1 year in 2 on average *Note: surface water supply systems only
2.4 Other considerations Other factors besides climate and weather can impact water supplies. These could include bushfires, capital and operational improvement projects, loss of power, water quality events, major asset failure or sabotage.
The issue of bushfires is weather dependant. CHW monitors conditions throughout the season in accordance with its Bushfire Preparedness Plan.
2.5 Action Plans
The 2017 UWS action plans were developed to highlight actions under the general categories of short, medium and long-term. The short-term actions (5 years and ongoing) have been reviewed as part of this annual update and any progress noted.
2.6 Explanation of Terms CHW – Central Highlands Water GSP – Goldfields Superpipe Percentile – measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall PWSR – Permanent Water Saving Rules UWS – Urban Water Strategy
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3.0 Climate Outlook Current climate and streamflow in the longer-term context Victoria’s climate has shown a warming and drying trend over recent decades, and this trend is expected to continue over the longer-term future. In comparison to historical conditions we are already experiencing: • Higher temperatures; • Reductions in rainfall in late autumn and winter and, in some locations, some increases in rainfall during the warmer months; and, • In many catchments, a shift in the streamflow response to rainfall, with less streamflow generated for the same amount of rain. Some of the rainfall decline in late autumn and winter can be attributed to global warming and changes in the weather systems that deliver rainfall to Victoria. The cause of the reduction in streamflow response to rainfall is not yet fully known and is the subject of continuing research. Over the longer term, we can expect: • the rainfall reductions in winter to persist; • possible increases in summer rainfall; • increases in potential evapotranspiration due to higher temperature and lower relative humidity; • reductions in streamflow because of less rainfall and higher potential evapotranspiration; and • the streamflow response to rainfall to no longer remain the same, and generally decline. Even if there is an increase in summer rainfall, it is unlikely to offset the streamflow impact of rainfall reductions in winter because most of the runoff in Victorian catchments occurs over winter and spring. In the warmer months, catchments are drier and more rainfall soaks into the ground, is used by vegetation or evaporates. Although there will still be a lot of variability in Victoria’s climate and streamflow, the chances of experiencing warmer conditions and less streamflow is now higher than in past decades. More information on the observed changes and longer-term future climate and water projections can be found at https://www.water.vic.gov.au/climate-change The Victorian Government is investing in further research to better understand how Victoria’s climate is changing and the water resource implications, as part of implementing the Water for Victoria plan. CHW monitors rainfall and stream flow outlooks based on the most up to date information provided from the Bureau of Meteorology at: http://www.bom.gov.au/climate/ahead/ Whilst this provides a useful guide, the outlooks generally do not extend for longer than 3 months. At the time of preparing this report the Bureau of Meteorology Climate Outlooks are indicating a 65 -70% chance of above median rainfall for the December 2020 to February 2021 period across the CHW region as shown in Figure 1 below. Document title: 2020 Water Outlook Version : Final Author: Pat Russell Doc code:BI/20/77966
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Figure 1 Bureau of Meteorology- Rainfall Outlooks
The corresponding temperature outlooks are for a high chance (60-65%) of above median maximum temperature as shown in Figure 2 below.
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Figure 2- Bureau of Meteorology temperature outlooks
The Bureau of Meteorology also produce streamflow projections at some stream flow gauging sites. Three are relevant to the CHW regions and are shown in Figure 3 below. Streamflow projections are generally for median flows: approximately 45% chance of median flows in the Lerderderg, and 47% in the Barwon Catchment and 49% chance of median flows at Tullaroop.
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Figure 3: Streamflow Projections in the CHW region (nearest BOM sites)
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4.0 Water Resource Actions A number of general system wide water supply and security actions are identified in the 2017 Urban Water Strategy (UWS) and these are listed as follows (system specific actions are covered in the individual system section later in the report).
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UWS Action Timeframe Comment reference RWS1 Forward plan for opportunities to extend On-going Early involvement with DELWP projects relating CHW’s interconnection to the State water to Water for Victoria actions on realising the grid, where it may be required to ensure potential of the grid and markets. secure and reliable supply for our customers within the next 50 years. Detailed technical studies and further customer and stakeholder engagement will form part of this process. RWS2 Continue to liaise with emergency response On-going CHW continues to maintain close relationships services and state government agencies to with emergency planning networks and agencies plan and be prepared for emergency events at local, regional and state level. In particular, via (e.g. bushfires) and influence operations to the Water Sector Resilience Network and reduce risk of negative impacts to water Regional and Municipal Emergency resources. Management Planning Committees. RWS3 Provide input as required to the State On-going The Long Term Water Resource Assessment Government’s long-term water resource has been completed. Work has commenced on assessment for Southern Victoria, the Gippsland and Central Region Sustainable scheduled for 2018 (and the Central Region Water Strategy and Central Highlands Water is Sustainable Water Strategy as per Action an active member of various working groups. RWC5). RWS4 Actively seek to have input and participation On-going CHW has continued to attend workshops, and in the south-central Victoria water market supported DELWP with work with the south trial, third party access regime and water market trial and Biennial Statements. grid oversight function, all new initiatives proposed in Water for Victoria.
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UWS Action Timeframe Comment reference RWS5 Deliver integrated water management Ongoing CHW has completed IWM plans for Ballarat and (IWM) projects in line with the Victorian IWM Maryborough. The development of the framework. This includes completion and Daylesford IWM Plan has commenced. CHW is implementation of the current Ballarat IWM working with its partners through the Central plan with lessons learnt to be applied to Highlands Region IWM Forum to deliver a range Maryborough and the Hepburn Shire during of IWM projects across the region, including the the next 5 year outlook. CHW will also seek Beaufort Closed Loop Recycled Water Scheme. to identify additional small system IWM projects that deliver community value and support improved operations and/or capacity of our water and wastewater systems. RWS6 Deliver major water supply network key Within 5 years CHW continues to undertake capital works within growth servicing and augmentation works in its water and sewer networks to expand them, the next 5 year period to support strong increase capacity and optimise them for the urban growth, as per key areas to be purpose of supporting urban growth. identified and confirmed in the CHW PR18 submission. RWS8 Consider the need to purchase extra On-going No requirement to purchase entitlement or entitlement/licence volume for surface water allocation at this stage. and/or groundwater on a permanent or temporary basis if and as required. Continue to monitor and review all system’s On-going No update since the 2017 UWS assessments water supply and demand including impacts but work has commenced to update models and b6 of climate change and population growth. assessments for the next UWS strategy due in March 2022.
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UWS Action Timeframe Comment reference
RWE1 Further develop and implement water On-going Target Your Water Use (TYWU) has been efficiency measures with our customers, adopted by CHW and all other Victorian including delivery of the state-wide Target Regional Water Corporations. CHW is currently Your Water Use program to the whole CHW implementing all of the initiatives listed under the region. Delivery of activities will be for both updated program. The program has been residential and non-residential customers included in the PR18 Pricing Submission and a with a stronger focus on areas where water review of the CHW Water Efficiency Strategy use is higher. The final scope of this program has been undertaken in conjunction program is currently being established but with by the Institute for Sustainable Futures will include technical efficiency (e.g. (ISF). appliance rebates) and behavioural influence (e.g. awareness and education). Further details are available from: www.chw.net.au/targetyourwateruse
RWE5 Commence a digital water metering trial in Within 12 months CHW has progressed to releasing an expression 2017 and review and identify potential for of interest for its digital metering project. This future digital metering implementation (by project is expected to be awarded by May – providing more frequent tracking of water June 2021. Implementation expected to be July use, digital metering increases awareness 2021. that can lead to changes in customers behavioural choices, support efficiency improvements to our water network, and aid earlier identification and remedy of leaks).
RWE7 Continue to implement non-revenue water Within 5 years Achieving the water loss reduction targets in reduction actions in accordance with PR18 PR18 involves building automated analytics into program, including CHW region-wide non- our SCADA data for water zones to automate
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UWS Action Timeframe Comment reference revenue water target of 9% (or less) by the alerts for bursts and leaks to assist with 2023 and installation of zonal meters across water loss identification areas. These analytics the bulk water pipe network to help monitor involve establishing a link between bulk water water usage and provide early detection of flow and water demand per zone combined with leaky mains and bursts. customer billing data information to provide up to date water balance data. In addition, Infrastructure CapEx improvements to both Daylesford water storage basins and further targeted water main renewals. A machine learning program is being used to help locate bursts and leaks across many of CHW’s water demand zones.
RWE8 Continue to monitor and review any water On-going Monitoring is in place, system performance is losses upstream of our water treatment actively reviewed and remediation actioned as plants (and thus not captured in the non- required. revenue water program), from for example, raw water distribution and storage sites. Review outcomes that may inform asset maintenance and renewal programs and priority areas for investment.
RWE9 Continue to monitor and review water use On-going Several sites are being investigated. from CHW's treatment facilities (water and wastewater) to identify opportunities for improved efficiency in our practice.
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5.0 Amphitheatre
5.1 Storage Forecast
5.2 Forecast Considerations
The Amphitheatre system is a small, regulated (non-potable) supply sourced from the local Amphitheatre Reservoir.
Outlooks are based on CHW’s Amphitheatre Water Supply Model. Refer to section 2.3 for likelihood ratings. This season the reservoir had not filled at the time of preparing this outlook and as a consequence the outlook projections are lower than for previous years. If dry conditions continue the system will be supplemented with groundwater and can also be readily supplied via water tankers which deliver to the tanks at the bore site. Given the low demand of this system, CHW will use water carting as required and would be unlikely to impose formal water restrictions. Water carting has been used in previous seasons to improve water quality and so operationally this process is well understood.
5.3 Overview of System Status
6 month outlook: Reservoir is at 80% capacity and may drawdown to a level requiring water carting if dry conditions prevail.
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12 month outlook: in the event of failure of inflows in the winter/spring of 2021 the reservoir may not recover sufficiently in which case groundwater use and water carting will continue to be required. The probability of this is low (<10%) which is the overall level of service for this system and consistent with the performance of a small one year supply type of system.
5.4 Bulk Water Demand
Amphitheatre Cumulative Bulk Water Demand 18 +15%, -10% Range for Average 5 year average 16 2019/2020 2020/2021 YTD
14
12
10
8
6 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
4
2
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. The year to date demand is currently low due to improved network and leak detection monitoring. While CHW is confident that losses are at a minimum, one leak can have a significant overall impact on a small system such as Amphitheatre.
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5.5 Action Plan - Amphitheatre
UWS Indicative Action Comment reference timeframe
Identify and assess alternative supply options for Within 5 years The Amphitheatre system will be reviewed as part of b1 responding to reduced water availability under dry preparation of the 2022 Urban Water Strategy. climate change scenarios.
Identify and assess opportunities to improve Within 5 years b2 regulated water quality for existing non-potable uses.
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6.0 Avoca
6.1 Groundwater Levels
6.2 Forecast Considerations
This system is a groundwater supplied system. Avoca sources its groundwater supply from the Bung Bong Bore field which is located in the Loddon Highlands Water Supply Protection Area. This is a very extensive aquifer system managed by Goulburn Murray Water. The bore field is well proved and there are no concerns regarding the availability of groundwater supplies in the outlook period. A second bore is available to provide operational backup and redundancy to the system and works to permanently connect it into the system will be completed in the year ahead.
6.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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6.4 Bulk Water Demand
Avoca Cumulative Bulk Water Demand 160 +15%, -10% Range for Average 5 Year Average 140 2019/2020 2020/2021 YTD
120
100
80
60 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
40
20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. The year to date is currently tracking at average levels.
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6.5 Action Plan Update - Avoca
Indicative UWS reference Action Comment timeframe
A new backup bore for the system has been drilled Complete overall investigations for the Avoca and tested with pump and connection work system covering treatment plant upgrade scheduled this financial year. requirements, selection of water sources Within 5 A concept design for replacement of the raw water UWS actionsC1-6,8,9 (groundwater and surface water) and years main has been completed and replacement is associated works for the Bung Bong bores, scheduled for the next water plan. raw water mains, Lead Dam and catchment management.
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7.0 Ballarat (This system supplies the following localities: Ballan, Ballarat, Buninyong, Cardigan Village, Creswick, Enfield, Gordon, Haddon, Miners Rest, Napoleons, Rokewood, Sebastopol, Skipton, Smythesdale, Snake Valley and Wendouree). 7.1 Storage Forecast
7.2 Forecast Assumptions
Refer to section 2.3 for likelihood ratings. It is assumed that no Goldfields super pipe pumping will be required in the 2020-2021 season.
7.3 Overview of System Status
6 and 12 month outlook: it is expected that all demand requirements will be met from local resources with no short term requirement for pumping via the Goldfields superpipe. Water restrictions will not be required in the outlook period. CHW holds reserves in its northern Victorian water accounts to provide water via the Goldfields Superpipe if an extremely dry summer and significant demand increase, or emergency incidents, were to occur.
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7.4 Bulk Water Demand
Ballarat Cumulative Bulk Water Demand 16000 +15%, -10% Range for Average 5 Year Average 14000 2019/2020 2020/2021 YTD
12000
10000
8000
6000 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
4000
2000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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7.5 Action Plan – Ballarat and District
UWS reference Action Indicative timeframe Comment
Continue to review and refine knowledge and Replacement of the Fellmongers operation of the Ballarat system including use of local Syphon has been completed. (UWS actions resources, use and expansion of the GSP, operation D4, 7, 9, 14 and Next 5 years and improvements to the Ballarat channel system, 15) use of northern Victorian entitlements and use of the Ballarat West bore field.
Risk assessment and risk reduction option study has been completed. Complete dam safety risk assessment at White Swan Design for upgrade works has Reservoir in accordance with ANCOLD guidelines Within 2 years d2 commenced. and develop any improvement options that may be required as a result of assessment outcome.
Ballarat IWM Plan has been Complete Ballarat Integrated Water Management completed. Working groups and Plan and implement agreed short term/priority Within 5 years individual organisations are d5 partnerships projects with the City of Ballarat, progressing their committed projects
Corangamite Catchment Management Authority and and actions. State Government.
Within 5 years These ongoing planning actions are Continue to develop growth servicing plans and d8 incorporated into business as usual system optimisation works (water and wastewater)
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UWS reference Action Indicative timeframe Comment
for key growth areas (including Ballarat West activities performed by the Strategic Employment Zone). Asset Management Planning Team.
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8.0 Beaufort (This system supplies Beaufort and Raglan). 8.1 Storage Forecast
8.2 Forecast Assumptions Refer to section 2.3 for likelihood ratings.
8.3 Overview of System Status
6 month outlook: the storage outlook shows some reduction in storage level under median and dry conditions but not to the extent of requiring restrictions. 12 month outlook: some use of the Raglan bore may be required under the median and dry scenarios to maintain good reserves in Musical Gully Reservoir but restrictions will not be required. The Raglan Bore is available to supply Raglan if flows from the Mt Cole Streams fail in the event of a very dry summer.
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8.4 Bulk Water Demand
Beaufort Cumulative Bulk Water Demand 200 +15%, -10% Range for Average 5 Year Average 180 2019/2020 2020/2021 YTD 160
140
120
100
80
Cumulative Bulk Demand (ML) Demand Bulk Cumulative 60
40
20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. Demand this year is tracking very close to average.
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8.5 Action Plan - Beaufort
UWS Indicative Action Comment reference timeframe
Concept and detailed design for a recycled water pipeline are nearing completion and CHW has commenced the Work with the Pyrenees Shire Council and the local approvals process with construction programmed for this community to identify and deliver local integrated water water plan period. e3 management projects, including non-potable fit-for- Within 5 years purpose supply options for local recreation and liveability assets.
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9.0 Blackwood (This system supplies Blackwood and Barry’s Reef). 9.1 Storage Forecast
9.2 Forecast Assumptions Refer to section 2.3 for likelihood ratings.
9.3 Overview of System Status
6 month outlook: no resource issues are anticipated over the 6 month outlook period. 12 month outlook: no resource issues anticipated over the 12 month outlook period although some drawdown of storage levels will occur under the dry scenarios.
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9.4 Bulk Water Demand
Blackwood Cumulative Bulk Water Demand 50 +15%, -10% Range for Average 5 Year Average 45 2019/2020 2020/2021 YTD 40
35
30
25
20
Cumulative Bulk Demand (ML) Demand Bulk Cumulative 15
10
5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. The past 2-3 seasons have seen an increase in demand which is partly due to increasing numbers of permanent residents in Blackwood. CHW is continuing to investigate all aspects of the supply demand balance to identify system improvements.
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9.5 Action Plan - Blackwood
UWS Indicative Action Comment Reference timeframe
Review available demand and supply options to respond Initial analysis of the system has been completed with a to possible shortfall in water supply under a step climate Within 5 years focus on the increased demand recorded in the past 2 f1 change scenario, including consideration of additional years. A range of initiatives are currently being considered. basin storage.
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10.0 Clunes
10.1 Groundwater Levels
10.2 Forecast Considerations
Clunes takes its groundwater supply from the Ascot zone of the Loddon Highlands Water Supply Protection Area. This is a very extensive aquifer system managed by Goulburn Murray Water. The bore field is well proved and there are no concerns regarding the short- term outlook for this system.
Groundwater allocations for the Ascot zone are at 100% for 2020-2021.
In the unlikely position of requiring more licence allocation, CHW would carry out short term allocation trade to ensure adequate ongoing supply.
10.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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10.4 Bulk Water Demand
Clunes Cumulative Bulk Water Demand 300 +15%, -10% Range for Average 5 Year Average 2019/2020 250 2020/2021 YTD
200
150
100 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
50
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. Demand this year is tracking very close to last year.
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10.5 Action Plan - Clunes
UWS Indicative Action Comment reference timeframe
Review utilisation and optimisation of the Kinnersley There are no volumetric concerns with the supply but g2 bore which is used less frequently than other bores due Within 5 years investigations to optimise water quality from the 3 bores in to different water quality. the borefield are in progress.
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11.0 Daylesford (This system supplies Daylesford and Hepburn Springs). 11.1 Storage Forecast
11.2 Forecast Assumptions Refer to section 2.3 for likelihood ratings.
11.3 Overview of System Status
6 month outlook: no supply issues anticipated over the next 6 months. 12 month outlook: this system has approximately 1 year supply in storage and is hence dependant on the reliable inflows to the system. The Daylesford system has a small storage capacity relative to its annual demand and given the overall dry seasonal climate outlook it is possible that system storage will track to the low side of the projected range. Several major projects have been completed to augment the supply system and reduce demand as outlined in Section 11.5. CHW is also continuing with planning for a connection to the Goldfields Superpipe. Design and alignment have been finalised and as much as possible is being done to ensure efficient and timely construction when this is required.
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11.4 Bulk Water Demand - Daylesford
Daylesford Cumulative Bulk Water Demand 900 +15%, -10% Range for Average 5 Year Average 800 2019/2020 2020/2021 YTD
700
600
500
400
300 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
200
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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11.5 Action Plan - Daylesford
UWS Action Indicative timeframe Comment Reference
Complete current works in progress in the Daylesford system including, pre-treatment of Coomoora H1, 2,3,4,9 groundwater, 2 ML Raw Water tank, Bullarto Reservoir Next 2 years All complete and operational. upgrade, WTP control and refine system operation to capitalise on these works.
Complete a Daylesford Integrated Water Management Plan within the next 5 years, in accordance with the Within 5 years Scheduled for 2020-2021. Project will commence in h5,11 DELWP Integrated Water Management Framework and early 2020. taking into consideration available alternative water initiatives, disused Wallaby Creek resources etc.
In response to climate change and improved level of service, design and, if required, deliver new water supply Design and approvals for GSP interconnection has h6,13 augmentation for Daylesford and Hepburn Springs, Within 5 years advanced. Planning approval for the pipeline alignment considering GSP interconnection, local system has commenced. enlargement.
Complete rehabilitation of the Daylesford low level basin Low level basin complete. clear water storage and commence planning for the Project planning has commenced for high level basin. h7 high-level basin, as required to replace aged Within 5 years infrastructure and reduce/eliminate any leakage/water losses.
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UWS Action Indicative timeframe Comment Reference
The development of a machine learning program has Identify, assess and implement options for reducing non- commenced to automate leak detection and support h8 revenue water demand (in accordance with PR18 non- Within 5 years analysis. revenue water program and targets).
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12.0 Dean
12.1 Groundwater Levels
12.2 Forecast Considerations
Dean sources its groundwater supply from the Bungaree Groundwater Water Supply Protection Area which is managed by Southern Rural Water. The bore field is well proved and there are no concerns regarding the short-term outlook for this system.
Generally, aquifer behaviour displays a lagged response to drought conditions and hence there will be good warning of possible resource shortages. Water quality can deteriorate after intense storms in which case water carting can be readily arranged for a small system like Dean.
12.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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12.4 Bulk Water Demand
Dean Cumulative Bulk Water Demand 16 +15%, -10% Range for Average 5 Year Average 14 2019/2020 2020/2021 YTD
12
10
8
6 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
4
2
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. Consumption in the past 18 months or so has been low due to active leak detection and repair but it must be cautioned that for such a small system this trend could easily reverse if a new leak develops and is not found quickly.
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12.5 Action Plan - Dean
Indicative UWS Reference Action Comment timeframe
Assess and implement required back-up Complete. Within 12 i1 infrastructure requirements for the Dean Bore months (e.g. spare pump).
Complete renewal of aged trunk water mains The new UV water treat facility has been completed. i3 to reduce risk of asset failure, microbiological Within 5 years
ingress, and high non-revenue water losses.
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13.0 Forest Hill (This system supplies Allendale, Broomfield, Newlyn, Kingston, Smeaton, and Springmount). 13.1 Groundwater Levels
13.2 Forecast Considerations
Forest Hill sources its groundwater supply from the Newlyn zone of the Loddon Highlands Water Supply Protection Area. This is a very extensive aquifer system managed by Goulburn Murray Water. The bore field is well proved and there are no concerns regarding the short- term outlook for this system.
Generally, aquifer behaviour displays a lagged response to drought conditions and hence there will be good warning of possible resource shortages.
Groundwater levels have continued to be low in the Forest Hill area in 2020 and at the start of this season Goulburn Murray Water have allocated only 75% of licence volume. Despite the reduced allocation CHW has sufficient reserve, including carryover from last season, to supply full demand without restriction. Given the low allocation, CHW will pay special attention to the operation of the borefield to avoid excessive drawdown in any bore.
CHW has completed a supply options investigation for this system given the ongoing low groundwater allocations in the Newlyn zone and these findings will inform the next urban water strategy which is due in March 2022.
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13.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
13.4 Bulk Water Demand
Forest Hill Cumulative Bulk Water Demand 200 +15%, -10% Range for Average 5 Year Average 180 2019/2020 2020/2021 YTD 160
140
120
100
80
Cumulative Bulk Demand (ML) Demand Bulk Cumulative 60
40
20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. High consumption for the year to date is due to a system leak which is proving difficult to locate and repair under locally wet conditions. It is expected to be able to address the issue once conditions dry in the next few months.
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13.5 Action Plan – Forest Hill
UWS Indicative Action Comment Reference timeframe
Identify and assess detailed options for reducing Investigations are ongoing. demand including delivery of non-revenue water and J1 customer water efficiency programs (noting that both Within 2 years non-revenue water and average household use are high in this system).
Continue to operate Forest Hill bore field to optimise CHW has completed a high-level investigation into supply groundwater yields and supply. Review these augmentation options for this system. Further operations to identify if any infrastructure changes consideration and analysis will be completed as part of j3 are also required (no new bores or deepening of On-going development of the next Urban Water Strategy due for bores proposed at this stage). completion in March 2022.
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14.0 Landsborough (This system supplies Landsborough and Navarre). 14.1 Groundwater Levels
14.2 Forecast Considerations
Landsborough sources its groundwater from an unincorporated area managed by Grampians Wimmera Mallee Water. The aquifer is not heavily utilised by other users and has proved to be resilient to extended drought periods.
Generally, aquifer behaviour displays a lagged response to drought conditions and hence there will be good warning of possible resource shortages.
14.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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14.4 Bulk Water Demand
Landsborough Cumulative Bulk Water Demand 35 +15%, -10% Range for Average 5 Year Average 2019/2020 30 2020/2021 YTD
25
20
15 Cumulative Bulk Demand (ML) Demand Bulk Cumulative 10
5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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14.5 Action Plan - Landsborough There are no 5 Year water resource actions for Landsborough.
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15.0 Learmonth
15.1 Groundwater Levels
15.2 Forecast Considerations
Learmonth sources its groundwater supply from the Ascot zone of the Loddon Highlands Water Supply Protection Area. This is a very extensive aquifer system managed by Goulburn Murray Water. Full allocation is available for the 2020-2021 season. The bore field is well proved and there are no concerns regarding the short-term outlook for this system.
15.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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15.4 Bulk Water Demand
Learmonth Cumulative Bulk Water Demand 60 +15%, -10% Range for Average 5 Year Average 2019/2020 50 2020/2021 YTD
40
30
20 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
10
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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15.5 Action Plan - Learmonth
Indicative UWS Reference Action Comment timeframe
Monitor and review the performance of the System is performing well. l1 Learmonth bore field following 2014 renewals On-going and upgrades.
Work with the City of Ballarat to identify This new system is working well and is almost completely potential local integrated water management independent of the potable system. options, including Learmonth Oval irrigation l2 Complete that could reduce the overall annual and peak daily demand requirements for treated water supply in this system.
Further investigate customer feedback Community consultation carried out in 2017-2018 and system received during our community engagement changes to chlorine levels have been implemented. l3 regarding chlorine levels in the Learmonth Complete water supply and identify any improvement options that can be implemented.
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16.0 Lexton
16.1 Groundwater Levels
16.2 Forecast Considerations
The groundwater supply is located in the Loddon Highlands Water Supply Protection Area. Generally, aquifer behaviour displays a lagged response to drought conditions and hence there will be good warning of possible resource shortages.
In the unlikely position of reduced licence allocations, we would carry out short-term allocation trade to ensure adequate ongoing supply.
16.3 Overview of System Status
6 month outlook: no supply issues anticipated although backup supply via either water carting or from the reservoir could be implemented if any issues develop with the new groundwater supply. 12 month outlook: no supply issues.
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16.4 Bulk Water Demand
Lexton Cumulative Bulk Water Demand 35 +15%, -10% Range for Average 5 Year Average 2019/2020 30 2020/2021 YTD
25
20
15 Cumulative Bulk Demand (ML) Demand Bulk Cumulative 10
5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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16.5 Action Plan - Lexton
Indicative UWS Reference Action Comment timeframe
Identify, assess and implement options for Not commenced - new zone meters proposed. reducing non-revenue water demand (in M1 Within 5 years accordance with PR18 non-revenue water program and targets).
Monitor and review Gordon Hill bore No further information gathered or analysed since finalising performance and assess if required supply the 2017 UWS. M5 On-going volumes can be sustained long-term (this bore has only been in use since 2015).
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17.0 Maryborough (This system supplies Alma, Bet, Carisbrook, Daisy Hill, Majorca, Maryborough and Talbot). 17.1 Storage Forecast
Note: the steps in the outlook are due to assumption of new seasonal allocations at Tullaroop on 1 July each year.
17.2 Forecast Assumptions Refer to section 2.3 for likelihood ratings.
17.3 Overview of System Status
6 month outlook: no supply issues are anticipated over next 6 months. 12 month outlook: even under a dry outlook with very dry conditions in the winter/spring of 2021 there are no supply issues expected in the outlook. Refer to Action plan, Section 17.5 for more details on system improvements. Extended outlook: if the 2021-2022 season proves to be dry then further drawdown could occur in the following summer. No specific actions for this unlikely occurrence are required at this stage. The system is vulnerable to water quality deterioration in the surface supplies. However recently completed upgrades to treatment facilities means that the system is now more resilient to a wide range of conditions.
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17.4 Bulk Water Demand
Maryborough Cumulative Bulk Water Demand 1800 +15%, -10% Range for Average 5 Year Average 1600 2019/2020 2020/2021 YTD
1400
1200
1000
800
600 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
400
200
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns.
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17.5 Action Plan - Maryborough
UWS Reference Action Indicative timeframe Comment
Continue to inform and educate the Maryborough community and customers Commenced and is n1 of recent water treatment upgrades and associated water quality Within 12 months ongoing. improvements.
Monitor, review and optimise the operations of the newly commissioned Commenced monitoring. (2017) salt reduction plant and supporting/ancillary assets, including n2 development and refinement of operational rules and triggers for different Within 2 years modes of treatment between groundwater and surface water plus management of the brine by-product from salt treatment processes.
Complete dam risk assessment of Centenary Reservoir (currently in progress) in accordance with ANCOLD guidelines and develop any Complete n3 improvement options that may be required as a result of assessment outcome.
Investigate and develop long-term system water resource strategies to cover Will be completed as part long term requirements under climate change taking account of system of the development of the n4,7,8,12,14 interconnection opportunities, and opportunities to increase permanent Within 5 years next Urban Water entitlement holding at the Stoney Creek bore, the Moolort bores and Strategy due for Tullaroop Reservoir completion in March 2022
Complete upgrade of Evansford raw water main as part of on-going asset Complete n5 Within 3 years maintenance and renewal program.
Complete a Maryborough Integrated Water Management Plan within the next Completed ahead of initial Complete n6 five years, in accordance with the DELWP Integrated Water Management schedule in 2018-2019. Framework and taking into consideration available alternative water initiatives
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UWS Reference Action Indicative timeframe Comment
that may support a response to reduced water availability under dry climate change scenarios.
Investigate upgrades for the Talbot and Tullaroop raw water main as part of Not commenced. n8 on-going asset maintenance and renewal program, taking account of raw Within 5 years water customer requirements, constraints and opportunities.
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18.0 Redbank
18.1 Groundwater Levels
18.2 Forecast Considerations
The Redbank bore accesses a local aquifer. In the event that this proves inadequate to meet demand the original bore will be operated.
18.3 Overview of System Status
6 and 12 month outlook: no supply issues anticipated although backup supply via water carting could be implemented if any issues develop with the groundwater supply.
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18.4 Bulk Water Demand
Redbank Cumulative Bulk Water Demand 6 +15%, -10% Range for Average 5 Year Average 2019/2020 5 2020/2021 YTD
4
3
2 Cumulative Bulk Demand (ML) Demand Bulk Cumulative
1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year
The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. The demand for this year has been below the expected range. It should be noted that trends can change quickly in small systems such as Redbank if even one burst cannot be rectified.
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18.5 Action Plan- Redbank
UWS Indicative Action Comment Reference timeframe
Review system performance and requirements, This review will be completed as part of developing the 2022 Urban taking account of the Redbank Reservoir resource, Water strategy for Redbank which will replace the existing strategy dam safety considerations, performance of the new o,1,2,4 bore, options and need for potable supply and Within 5 years interconnection with other systems.
Identify, assess and implement options for reducing Not commenced. o3 non-revenue water demand (in accordance with Within 5 years PR18 non-revenue water program and targets).
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19.0 Waubra
19.1 Groundwater Levels
19.2 Forecast Considerations
Waubra sources its groundwater supply from the Waubra zone of the Loddon Highlands Water Supply Protection Area. This is a very extensive aquifer system managed by Goulburn Murray Water. The bore field is well proved and there are no concerns regarding the short- term outlook for this system. Generally, aquifer behaviour displays a lagged response to drought conditions and hence there will be good warning of possible resource shortages. In the unlikely position of reduced licence allocations, CHW would carry out short-term allocation trade to ensure adequate ongoing supply.
19.3 Overview of System Status
6 month outlook: no supply issues. 12 month outlook: no supply issues.
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19.4 Bulk Water Demand
Waubra Cumulative Bulk Water Demand 35 +15%, -10% Range for Average 5 Year Average 2019/2020 30 2020/2021 YTD
25
20
15 Cumulative Bulk Demand (ML) Demand Bulk Cumulative 10
5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Weeks in Financial Year The above bulk water demand illustration shows the 5 year average, the previous financial year, the actual year to date and the range of lower and upper bound scenarios subject to climatic conditions and customer usage patterns. Total water consumption is below average for the year to date.
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19.5 Action Plan - Waubra
Indicative UWS Reference Action Comment timeframe
Investigate water quality improvement options to A preferred option for treatment of the local groundwater meet aesthetic drinking water standards in resource has been identified and design is progressing. Waubra. This process will include further p1 consultation with the local community. Options to Within 3 years be considered include local alternative supply options and/or assessing potential interconnection opportunities with neighbouring supply systems.
Complete upgrade of Waubra clear water tanks (if Preliminary design completed, no further action required until p2 still applicable following water quality Within 3 years action P1 is completed. improvement reviews).
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