Modelling water demand and trade on the Murray and lower Darling rivers

Poster


Alam, Md Jahangir, Bethune, Matthew, Townsend, Phil and Close, Andy. 2014. "Modelling water demand and trade on the Murray and lower Darling rivers." 17th International River Symposium 2014: Excellence Collaboration Integration. Canberra, Australia 15 - 18 Sep 2014 Canberra, Australia.
Paper/Presentation Title

Modelling water demand and trade on the Murray and lower Darling rivers

Presentation TypePoster
AuthorsAlam, Md Jahangir (Author), Bethune, Matthew (Author), Townsend, Phil (Author) and Close, Andy (Author)
Journal or Proceedings TitleProceedings of the 17th International River Symposium 2014
Year2014
Place of PublicationCanberra, Australia
Conference/Event17th International River Symposium 2014: Excellence Collaboration Integration
Event Details
17th International River Symposium 2014: Excellence Collaboration Integration
Event Date
15 to end of 18 Sep 2014
Event Location
Canberra, Australia
Abstract

The Murray–Darling Basin is one of the largest river systems in the world. It supports a large community and is ecologically diverse. The Basin Plan is being implemented to restore the balance between consumptive uses and environmental health in the Basin. The socio-economic implications are a critical consideration in any change to this balance. Under the Basin Plan, considerable effort was invested into understanding how irrigation communities will respond under different water availability/management scenarios. This paper builds on this understanding by enhancing modelling approaches used in water resource planning to represent how irrigator's behaviour may change in response to new water management rules.
The analysis uses a new demand model in the Source IMS river modelling platform. The amount of water available to an irrigator is the key modelled decision variable, impacting on crop areas and crop mix. The available water is dependent on carryover from last year, allocated water, planned trade of allocation and planned carryover into the next irrigation season. Prior to making a planting decision, the irrigator will review their water portfolio and make a decision on how much water they plan to trade (in or out) and how much water they plan to carry-over into the next season. The resulting available water is then used to make a decision on what area they will plant to different crop types each year. This logic represents the trading of water to support urban and permanent horticultural plantings in low allocation years. Conversely, allocation is traded to increase the area of annual cropping systems in years of high water availability. The irrigators water portfolio is reviewed as the season progresses. If they are likely to run out of water, a decision is made to either reduce irrigation intensity (ie go into survival mode), cut back the irrigated area or to buy additional water. Any surplus water could be sold. The approach is tested against available land use, water use and trade data on the Murray and Lower Darling rivers.

Keywordsdemand modelling; source IMS; water diversion; Murray River; lower Darling River; basin plan
ANZSRC Field of Research 2020370704. Surface water hydrology
410406. Natural resource management
300201. Agricultural hydrology
Public Notes

This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.

Byline AffiliationsSchool of Civil Engineering and Surveying
Murray-Darling Basin Authority, Australia
Institution of OriginUniversity of Southern Queensland
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