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Fresh tomato production for the Sydney market: An evaluation of options to reduce freshwater scarcity from agricultural water use

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  • Page, Girija
  • Ridoutt, Brad
  • Bellotti, Bill

Abstract

In response to the growing concerns of freshwater scarcity, two metrics are considered for assessing the impacts of consumptive water use of a kg of fresh tomato supplied to the Sydney market. The first is the water use efficiency (WUE)—commonly used by agronomists which considers the absolute volumes of water consumed, and second, a recently developed method for water footprints based on Life Cycle Assessment (LCA) which describes the impacts in terms of contributing to freshwater scarcity. The results indicated that although a kg of tomato supplied from within Sydney had the highest water use efficiency (38L for a kg of tomato as compared to 39–78L from other regions of Australia), it had the biggest LCA-based water footprint (16L for a kg of tomato as compared to 1.9–2.2L from other regions of Australia). WUE as an indicator of agriculture water use is inappropriate to indicate the potential to contribute to local freshwater scarcity; potential stress on local and regional water resources, estimated using LCA-based water footprints, provide useful dimension to assess consumptive water use. Having both metrics will enable to achieve short term benefits at the farm level for saving water (through water use efficiency), while also recognising that longer term changes are required for alleviating freshwater scarcity (through LCA-based water footprints). Scenario modelling indicated relocation of production away from Sydney or modernisation of Sydney tomato greenhouse industry as a priority for reducing freshwater scarcity. The latter may be the best long term option to reduce additional emissions from transport and to take advantage of recycled water sources from Sydney's wastewater.

Suggested Citation

  • Page, Girija & Ridoutt, Brad & Bellotti, Bill, 2011. "Fresh tomato production for the Sydney market: An evaluation of options to reduce freshwater scarcity from agricultural water use," Agricultural Water Management, Elsevier, vol. 100(1), pages 18-24.
    • Handle: RePEc:eee:agiwat:v:100:y:2011:i:1:p:18-24
    DOI: 10.1016/j.agwat.2011.08.017
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    References listed on IDEAS

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    1. Ness, Barry & Urbel-Piirsalu, Evelin & Anderberg, Stefan & Olsson, Lennart, 2007. "Categorising tools for sustainability assessment," Ecological Economics, Elsevier, vol. 60(3), pages 498-508, January.
    2. Çetin, Öner & Uygan, Demet, 2008. "The effect of drip line spacing, irrigation regimes and planting geometries of tomato on yield, irrigation water use efficiency and net return," Agricultural Water Management, Elsevier, vol. 95(8), pages 949-958, August.
    3. Assumpcio Anton & Juan I. Montero & Pere Munoz & Francesc Castells, 2005. "LCA and tomato production in Mediterranean greenhouses," International Journal of Agricultural Resources, Governance and Ecology, Inderscience Enterprises Ltd, vol. 4(2), pages 102-112.
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    1. Bradley G. Ridoutt & Peerasak Sanguansri & Gregory S. Harper, 2011. "Comparing Carbon and Water Footprints for Beef Cattle Production in Southern Australia," Sustainability, MDPI, vol. 3(12), pages 1-13, December.

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