EconPapers    
Economics at your fingertips  
 

Optimal Dynamic Water Allocation: Irrigation Extractions and Environmental Tradeoffs in the Murray River, Australia

R. Quentin Grafton, Long Chu, Michael Stewardson and Tom Kompas

Centre for Water Economics, Environment and Policy Papers from Centre for Water Economics, Environment and Policy, Crawford School of Public Policy, The Australian National University

Abstract: A key challenge in managing semi-arid Basins, such as in the Murray-Darling in Australia, is to balance the trade-offs between the net benefits of allocating water for irrigated agriculture, and other uses, versus the costs of reduced surface flows for the environment. Typically, water planners do not have the tools to optimally and dynamically allocate water among competing uses, and water is misallocated. We address this problem by developing a general stochastic, dynamic programming model with four state variables (the drought status, the current weather, weather correlation and current storage) and two controls (environmental release and irrigation allocation) to optimally allocate water between extractions and in-situ uses. The model is calibrated to Australia’s Murray River and shows: (1) ‘pulse’ or artificial flood events are insensitive to parameter values; (2) from 2001-2009 a water reallocation that would have given less to irrigated agriculture and more to environmental flows would have generated between half a billion and over three billion USD in overall economic benefits; and (3) water markets increase optimal environmental releases by reducing the losses associated with reduced water diversions.

Keywords: Environmental flows; pulse effect; dynamic programming; Murray-Darling Basin; trade-offs (search for similar items in EconPapers)
JEL-codes: C61 C63 Q22 Q27 (search for similar items in EconPapers)
Pages: 38
Date: 2010-08
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://cweep.anu.edu.au/pdf/publications/research_ ... water_allocation.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:een:cweanu:1008

Access Statistics for this paper

More papers in Centre for Water Economics, Environment and Policy Papers from Centre for Water Economics, Environment and Policy, Crawford School of Public Policy, The Australian National University Contact information at EDIRC.
Bibliographic data for series maintained by CAP Web Team ().

 
Page updated 2025-03-30
Handle: RePEc:een:cweanu:1008