Cost‐Effective Strategies to Mitigate Multiple Pollutants in an Agricultural Catchment in North Central Victoria, Australia

20 Pages Posted: 21 Jun 2013

See all articles by Graeme J. Doole

Graeme J. Doole

The University of Western Australia - School of Agricultural and Environment

Olga Vigiak

Government of Victoria - Department of Primary Industries

David J. Pannell

University of Western Australia

Anna Roberts

Primary Industries Research Victoria

Date Written: July 2013

Abstract

Strategies to reduce phosphorus and sediment yields are identified for two Australian catchments using a nonlinear optimisation model. This provides novel insight into the cost‐effective management of dual pollutants of water courses in Australia. A strong degree of complementarity between the two pollutants is highlighted, given the adsorption of phosphorus to sediment that augments the value of gully and streambank management for mitigation. However, the relationship between the two pollutants is asymmetric. A 30 per cent reduction in phosphorus yield achieves a 75 per cent reduction in sediment yield in one catchment, while a 30 per cent reduction in sediment yield achieves only a 12 per cent reduction in phosphorus yield. Sediment abatement costs are low given the efficiency of gully and streambank management. A 30 per cent phosphorus reduction lowers profit by 3–7 per cent, while a 30 per cent sediment reduction lowers profit by around 1 per cent. Land‐use optimisation requires spatial heterogeneity in land‐use and gully/streambank management responses. Overall, this research demonstrates the need to determine whether one pollutant is more important than another, while recognising the potential that mitigation practices possess for the reduction of multiple emissions during their evaluation.

Keywords: multiple pollutants, nonlinear optimisation, water quality

Suggested Citation

Doole, Graeme J. and Vigiak, Olga and Pannell, David J. and Roberts, Anna, Cost‐Effective Strategies to Mitigate Multiple Pollutants in an Agricultural Catchment in North Central Victoria, Australia (July 2013). Australian Journal of Agricultural and Resource Economics, Vol. 57, Issue 3, pp. 441-460, 2013. Available at SSRN: https://ssrn.com/abstract=2282918 or http://dx.doi.org/10.1111/1467-8489.12003

Graeme J. Doole (Contact Author)

The University of Western Australia - School of Agricultural and Environment ( email )

Nedlands, Western Australia 6907
Australia

Olga Vigiak

Government of Victoria - Department of Primary Industries

Melbourne, Victoria 3002
Australia

David J. Pannell

University of Western Australia ( email )

35 Stirling Highway
Crawley, Western Australia 6009
AUSTRALIA
(08) 9844 8659 (Phone)
(08) 9844 8659 (Fax)

HOME PAGE: http://www.general.uwa.edu.au/u/dpannell/welcome.html

Anna Roberts

Primary Industries Research Victoria ( email )

PO Box 500
Rutherglen
Melbourne, Victoria 8002
Australia

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