Report of Working Group to Joint Agroforestry Management Committee on Incentives for tree planting in irrigation areas [Victoria]
1991
Gross, R. | Loane, W. (Victorian Dept. of Agriculture (Australia)) | Bolger, P. (Rural Water Commission of Victoria) | Proussard, H. | Ritchie, K. (Victorian Dept. of Conservation and Environment (Australia))
Two main types of salinity control benefit from tree planting were identified: watertable control and reducing export of saline water. Several types of site may provide positive economic benefits from agricultural protection due to watertable control. Simulation modelling with MODFLOW indicated that the benefits of trees for agricultural protection were mostly limited to the property of the tree planter, hence no government incentives were justified. Sub-surface drainage schemes also have predominantly localised benefits. Analysis showed that trees are the most economic short-term means of disposing of saline pumped groundwater. Imposing a charge equal to the cost of salt disposal would supersede the need for tree incentives. Any funds for tree planting for salinity control should derive from budgets already allocated to measures which generate similar local benefits.
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