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Derivation of supply curves for catchment water effluents meeting specific salinity concentration targets in 2050: linking farm and catchment level models or “Footprints on future salt / water planes”

Listed author(s):
  • Nordblom, Thomas L.
  • Bathgate, Andrew D.
  • Young, Robert A.
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    The salt burden in a stream reflects the blend of salty and fresh flows from different soil areas in its catchment. Depending not only on long-run rainfall, water yields from a soil are also determined by land cover: lowest if the area is forested and greatest if cleared. Water yields under agro-forestry, lucerne pasture, perennial grass pasture, and annual pasture or cropping options span the range of water yields between the extremes of forested and cleared lands. This study explores quantitative approaches for connecting the hydrologic and economic consequences of farm-level decisions on land cover (productive land uses) to the costs of attaining different catchment level targets of water volumes and salt reaching downstream users; environmental, agricultural, domestic, commercial and industrial. This connection is critical for the resolution of the externality dilemma of meeting downstream demands for water volume and quality. New technology, new products and new markets will expand options for salinity abatement measures in the dryland farming areas of watershed catchments. The development of appropriate policy solutions to address demands for water volumes and quality depends on the possibility of inducing targeted land use change in those catchments or parts of catchments where decreased saline flows or increased fresh water flows can return the best value for money. This study provides such a link.

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    Paper provided by Australian Agricultural and Resource Economics Society in its series 2003 Conference (47th), February 12-14, 2003, Fremantle, Australia with number 57929.

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    Date of creation: Feb 2003
    Handle: RePEc:ags:aare03:57929
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    AARES Central Office Manager, Crawford School of Public Policy, ANU, Canberra ACT 0200

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    1. Ian D. Hodge, 1982. "Rights To Cleared Land And The Control Of Dryland‐Seepage Salinity," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 26(3), pages 185-201, December.
    2. John C. Quiggin, 1986. "Common Property, Private Property And Regulation The Case Of Dryland Salinity," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 30(2-3), pages 103-117, 08-12.
    3. Bathgate, Andrew D., 2002. "Economic and physical attributes of dryland salinity in NSW: A review," 2002 Conference (46th), February 13-15, 2002, Canberra 125055, Australian Agricultural and Resource Economics Society.
    4. Heaney, Anna & Beare, Stephen & Bell, Rosalyn, 2001. "Evaluating improvements in water use efficiency as a salinity mitigation option in the South Australian Mallee areas," 2001 Conference (45th), January 23-25, 2001, Adelaide 125652, Australian Agricultural and Resource Economics Society.
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