1. Regional impacts of climate change on dryland farms: or what characteristics make a farm vulnerable or resilient? Dept of Agriculture and Food, Western Australia & University of Western Australia Ross Kingwell

2. Bio-economic modelling of farms in 3 regions

3. Scenario Analysis 2916*30= 87480 observations of 20 year sequences 2916 Total number of treatments 2 Climate change Current climate Climate 2 Crossbred lamb production Merino wool production Livestock system 7.5 6.5 4.5 If in surplus (%) 3 11.5 10.5 8.5 If in debit (%) Interest rates 2 3 4 % increase in costs 3 3 2 2 % increase in returns Terms of trade 3 2,000 1,000 0 2,500 1,250 0 1,000 500 0 Starting debt ($K) 3 32 42 64 36 50 76 52 72 84 Percentage of area cropped (%) 3 1,500 750 375 1,420 710 355 2,000 1,000 160 Off-farm asset ($K) 3 3,000 2,200 1,650 4,500 3,300 2,475 6,000 4,800 3,600 Farm size (ha) No. of characteristics Southern high rainfall region Northern high rainfall region North-eastern low rainfall region Key Variable

5. Regression analysis Farm characteristics (farm size, percentage of land allocated to crop production, starting debt, off farm assets, terms of trade and interest rates) were related to: the NPV of farm profit and the probability of the farm’s equity falling below 65%.

6. Low rainfall farms All farms exposed to climate change exhibit higher levels of financial risk Many farms that exhibit the greatest difference in risk between climates, are farms with relatively low levels of risk in the current climate (see red line). Most farms under current climate (& related scenarios) have sound prospects of remaining viable.

7. Which farms are ‘at risk’? The locus of ‘at risk’ conditions (80% chance of equity falling below 65%)

9. Higher rainfall northern region farms Some farms show a high risk of insolvency even under current climate (purple oval). Fewer farms are greatly affected by climate change in comparison to those located in the low rainfall region (red line). However there are still many farms that face considerable business risk (blue arrow).

11. Higher rainfall southern region farms Climate change provides more favourable production conditions. Farm business risk is reduced but some farms still face considerable financial risk

12. Characteristics of ‘at risk’ farms Farms most vulnerable to insolvency are those farms that generally display high levels of farm debt and small farm size When some farms that are vulnerable under current climate then experience higher crop yields and high stocking rates under climate change these farms significantly reduce their business risk

14. Thank You

15. Projected changes in wheat yields

16. Bio-economic modelling Case study farms in each region are constructed using an Excel® based simulation model (Bennett et al. 2003; Abrahams et al. 2008). Model is known as STEP (Simulated Transitional Economic Planning) STEP can be tailored to describe a range of case study farms. STEP tracks a farm’s physical and financial performance over a 20 year period. It integrates paddock level decisions into whole-farm financial analysis by linking information on enterprise options into a whole-farm analysis. Essentially a whole-farm budgeting tool. It allows for some state-dependent tactical decision-making