Border Rivers Queensland Border Rivers Model Results to Support Basin Plan Requirements Water Planning and Coastal Sciences November 2018 Department of Environment and Science Prepared by Queensland Hydrology Water Planning and Coastal Sciences Science and Technology Division Department of Environment and Science GPO Box 2454 Brisbane Qld 4001 © The State of Queensland (Department of Environment and Science) 2018 The Queensland Government supports and encourages the dissemination and exchange of its information. The copyright in this publication is licensed under a Creative Commons Attribution 3.0 Australia (CC BY) licence Under this licence you are free, without having to seek permission from DSITI, to use this publication in accordance with the licence terms. You must keep intact the copyright notice and attribute the State of Queensland, Department of Science, Information Technology and Innovation as the source of the publication. For more information on this licence visit http://creativecommons.org/licenses/by/3.0/au/deed.en Disclaimer This document has been prepared with all due diligence and care, based on the best available information at the time of publication. The department holds no responsibility for any errors or omissions within this document. Any decisions made by other parties based on this document are solely the responsibility of those parties. Information contained in this document is from a number of sources and, as such, does not necessarily represent government or departmental policy. If you need to access this document in a language other than English, please call the Translating and Interpreting Service (TIS National) on 131 450 and ask them to telephone Library Services on +61 7 3170 5725 Citation DES, 2018. Border Rivers – Queensland Border Rivers Model Results to Support Basin Plan Requirements, Queensland Department of Environment and Science, Brisbane. November 2018 ii Hydrology Project Number: 416 000.PR/7 Contents 1 Introduction ............................................................................................................................. 7 1.1 Current model 7 1.2 Proposed Model 7 1.3 Basin Plan Requirements 8 2 Border Rivers Source Model ................................................................................................ 10 3 Model Scenarios .................................................................................................................... 11 3.1 Without Development Scenarios 11 3.2 With Development Scenarios 11 3.2.1 Current IGA/BDL IQQM Model 12 3.2.2 Current ROP IQQM Model 12 3.2.3 Proposed Source Water Plan Model 12 4 Reconciliation with Murray–Darling Basin Plan Schedule 3 .............................................. 15 4.1 Comparison of Flows for the IQQM and Source Without Development Scenarios 15 4.2 Comparison of Diversions to the Reference Scenarios 16 5 Conclusion ............................................................................................................................. 19 6 References ............................................................................................................................. 20 Appendix A – Flow Comparisons .............................................................................................. 21 Appendix B – Mass Balance....................................................................................................... 27 Upstream extent of the Weir River to Talwood (416202a) 28 The Macintyre Brook to its confluence with the Dumaresq River 29 Upstream extent of the Dumaresq River to its confluence with the Macintyre Brook 30 Upstream extent of the Macintyre River to Holdfast (416012) 31 Dumaresq River downstream of the Macintyre Brook confluence and the Macintyre River from Holdfast (416012) to Goondiwindi (416201a) 32 Macintyre River and Barwon River from Goondiwindi (416201a) to Mungindi (416001) 33 The NSW Border Rivers floodplains including Boomi River and Whalan Creek 34 iii Department of Environment and Science List of tables Table 1: Description of relevant model scenarios .......................................................................... 11 Table 2: Comparison of without-development flows between IQQM (BRI-806B) and Source (BRS- 181128A) ...................................................................................................................................... 16 Table 3: Simulated diversions under the current IGA, BDL, ROP, and proposed WP scenarios.... 17 Table 4: Long-term mean annual diversions from watercourses under water allocations and licences: comparison of BRI-0609U, BRI-1811B, BRI-0906E, BRI-1811B, BRS-181015A ............ 19 Table B.1: Water balance for the upstream extent of the Weir River to Talwood (416202a; and Yarrilwanna Creek near Talwood at node 0039) for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .................................................................................................. 28 Table B.2: Water balance for the upstream extent of the Macintyre Brook to its confluence with the Dumaresq River for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .................................................................................................................................... 29 Table B.2: Water balance for the upstream extent of the Dumaresq River to its confluence with the Macintyre Brook for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .................................................................................................................................... 30 Table B.2: Water balance for the upstream extent of the Macintyre River to Holdfast (416012) for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .......................... 31 Table B.2: Water balance for the Dumaresq River downstream of the Macintyre Brook and the Macintyre River from Holdfast (416012) to Goondiwindi (416201a) for model scenario BRS- 181015A over the model period 01/07/1895 to 30/06/2009 ........................................................... 32 Table B.2: Water balance for the Macintyre River and Barwon River from Goondiwindi (416201a) to Mungindi (416001) for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .................................................................................................................................... 33 Table B.2: Water balance for the NSW Border Rivers floodplains including Boomi River and Whalan Creek to its confluence with the Barwon River below Neeworra (416028a) for model scenario BRS-181015A over the model period 01/07/1895 to 30/06/2009 .................................... 34 iv Hydrology Project Number: 416 000.PR/7 List of figures Figure 1: The Border Rivers and Macintyre Brook Water Supply Schemes ................................... 13 Figure 2: Water Management Areas in the Queensland Border Rivers ......................................... 14 Figure A.1: Comparison of modelled flow at Roseneath (416011) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................................ 21 Figure A.2: Comparison of modelled flow at Goondiwindi (416201A) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................ 22 Figure A.3: Comparison of modelled flow at Talwood (416202A) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................................ 23 Figure A.4: Comparison of modelled flow at Kanowna (416048) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................................ 24 Figure A.5: Comparison of modelled flow at Mascot (416207A) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................................ 25 Figure A.6: Comparison of modelled flow at Mungindi (416001) – without development scenarios for previous (BRI-608B) and updated (BRS-181128A) calibration ................................................ 26 v Department of Environment and Science Glossary BDL Baseline Diversion Limit CEWH Commonwealth Environmental Water Holder BRI Border Rivers IQQM BRS Border Rivers Source IGA Intergovernmental Agreement ROP Resource Operations Plan SDL Sustainable Diversion Limit WAN Water Allocation Number WMA Water Management Area WP Water Plan WRP Water Resource Plan vi Hydrology Project Number: 416 000.PR/7 1 Introduction The Border Rivers model was developed by using Source Model as a platform. A detailed background to the data used, methodology, calibration and validation of the model development is documented in the Border Rivers calibration report (DES 2018b). 1.1 Current model In preparing a Water Resource Plan (WRP), Resource Operations Plan (ROP), or Water Plan (WP) under the Water Act 2000 (Qld), the State of Queensland develops hydrologic models to test management scenarios. The current plans, viz. the Border Rivers Water Resource Plan 2003 (the WRP) and the Border Rivers Resource Operations Plan May 2011 (the ROP), are underpinned by models developed in the Integrated Quantity Quality Model (IQQM) modelling platform. The current ROP model for the Border Rivers also forms the basis for the audited Cap model which supports Cap Reporting requirements under the Murray–Darling Basin Agreement and in