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Doole G, O Vigiak, AM Roberts and DJ Pannell (2013) Cost-effective strategies to mitigate multiple pollutants in an agricultural catchment in North-Central Victoria, Australia. AUSTRALIAN JOURNAL OF AGRICULTURAL AND RESOURCE ECONOMICS 57:441-460

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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