Urban and Stock and Domestic Demands on the Murray and Lower Darling Rivers Technical Report No
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Urban and stock and domestic demands on the Murray and Lower Darling rivers Technical Report No. 2018/16 Attachment C March 2016 Matthew Bethune Urban and Stock and Domestic Demand on the Murray and Lower Darling Rivers Published by the Murray-Darling Basin Authority Postal Address: GPO Box 1801, Canberra ACT 2601 Telephone: (02) 6279 0100 international + 61 2 6279 0100 Facsimile: (02) 6248 8053 international + 61 2 6248 8053 Email: [email protected] Internet: http://www.mdba.gov.au All material and work produced for the Murray-Darling Basin Authority constitutes Commonwealth copyright. MDBA reserves the right to set out the terms and conditions for the use of such material. 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As far as practicable, material for which the copyright is owned by a third party will be clearly labelled. The Murray-Darling Basin Authority has made all reasonable efforts to ensure that this material has been reproduced in this publication with the full consent of the copyright owners. Inquiries regarding the licence and any use of this publication are welcome by contacting the Murray- Darling Basin Authority. Disclaimer The views, opinions and conclusions expressed by the authors in this publication are not necessarily those of the Murray-Darling Basin Authority or the Commonwealth. To the extent permitted by law, the Murray-Darling Basin Authority and the Commonwealth excludes all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses and any other compensation, arising directly or indirectly from using this report (in part or in whole) and any information or material contained within it. Accessibility Australian Government Departments and Agencies are required by the Disability Discrimination Act 1992 (Cth) to ensure that information and services can be accessed by people with disabilities. If you encounter accessibility difficulties or the information you require is in a format that you cannot access, please contact us. Urban and Stock and Domestic Demand on the Murray and Lower Darling Rivers Executive Summary • This reports summarises the conceptual model adopted to represent urban and stock and domestic demands on the Murray and Lower Darling System. • A conceptual model of urban and stock and domestic demand has been adopted and is based on feedback from the States. This model includes drivers for: o critical human water needs, o climatic drivers, and o water restrictions. • The model is parameterized in this report and does not require calibration. • The model is considered to provide an acceptable representation of urban demands and is considered ‘fit for purpose’ for the Source Murray Model, with the following two provisions o South Australia metropolitan Adelaide demand is not represented by this model o Lower Darling Urban (Broken Hill) demands are not well modelled and existing regression relationship should be maintained until a suitable alternative is developed. Page i Urban and Stock and Domestic Demand on the Murray and Lower Darling Rivers Contents Executive Summary ............................................................................................................... i 1 Problem Definition .......................................................................................................... 1 1.1 Introduction- Problem Statement ............................................................................. 1 2 Overview of urban water supply on the River Murray and Lower Darling system ........... 2 2.1 NSW ....................................................................................................................... 2 2.2 South Australia ....................................................................................................... 3 2.3 Victoria .................................................................................................................... 4 3 Modelling Approach ....................................................................................................... 4 4 Model calibration ............................................................................................................ 7 5 Validation – NSW urban and stock and domestic demands ........................................... 7 5.1 Model validation ...................................................................................................... 8 6 Victorian urban demands ............................................................................................. 11 6.1 Model parameters ................................................................................................. 11 6.2 Validation .............................................................................................................. 14 7 Country town demands for South Australia .................................................................. 16 8 Limitations and Significance ......................................................................................... 17 9 Conclusions ................................................................................................................. 18 10 Recommendations ................................................................................................... 18 11 References ............................................................................................................... 19 Page ii Urban and Stock and Domestic Demand on the Murray and Lower Darling Rivers Figures Figure 1. Pattern of average monthly use (expressed as a percentage of annual use).......... 5 Figure 2 The relationship of variable demands in response to water availability ................... 7 Figure 3 Albury urban demand model ................................................................................... 9 Figure 4 Berrigan Shire urban demand model ....................................................................... 9 Figure 5 Corowa Shire urban demand model ........................................................................ 9 Figure 6 Deniliquin Shire urban demand model..................................................................... 9 Figure 7 Murray Shire urban demand model ....................................................................... 10 Figure 8 Wakool Shire urban demand model ...................................................................... 10 Figure 9 Wentworth Shire urban demand model ................................................................. 10 Figure 10 Murray stock and domestic demand model ......................................................... 10 Figure 11 Lower Darling urban demand model (DARDIVA) ................................................ 11 Figure 12 Lower Darling stock and domestic demand model .............................................. 11 Figure 13 Coliban Water urban demand model ................................................................... 14 Figure 14 Goulburn Valley urban demand model ................................................................ 14 Figure 15 Lower Murray urban demand model .................................................................... 15 Figure 16 North East Water urban demand model .............................................................. 15 Figure 17 Northern Mallee stock and domestic ................................................................... 15 Figure 18 Millewa Waterworks District (D&S) & private irrigation ........................................ 15 Figure 19 South Australia County towns demand model ..................................................... 16 Tables Table 1 Urban water entitlements for NSW (Source: WAM worksheet 2012-13) ................... 2 Table 2 Urban water entitlements for South Australia............................................................ 3 Table 3 Urban water entitlements for Murray Victoria (Source: WAM worksheet 2012-13) .... 4 Table 4. Announced allocation used in different urban demand models ................................ 7 Table 5. Murray water source, urban and stock and domestic models .................................. 8 Table 6. Murray water source, urban and stock and domestic models ................................ 12 Table 7. Distribution of diversions by Coliban water ............................................................ 13 Table 8. Distribution of urban diversions by Goulburn Valley Water .................................... 13 Table 9. Distribution of urban diversions by Lower Murray Water. ....................................... 13 Table 10. Distribution of urban diversions by North East Water ..........................................