OptiSurface Landforming technology promises to revolutionise agriculture by providing all the benefits of tradional laser leveling but with: * much lower earthworks and therefore cost, * much reduced topsoil interference and * in a much shorter time.

1. Optimum Surface Landforming Technology Dr Graeme Cox Dave Cox O PTI S URFACE By

7. Existing Topography C7

8. Plane of Best Fit C7

9. Plane of Best Fit - Cutill Map Cut: 791m 3 /ha Cost: $1,190/ha Max Cut: 0.350m C7

10. OptiSurface Design Constraints Minimum Downslope: 1: 900 0.111% Maximum Downslope: 1: 30 0 0.33 3 % Max. Downslope change: 1: 4000 0.025% Minimum Cross-slope: 1: -200 -0.500% Maximum Cross-slope: 1: 200 0.500% Max. Cross-slope change: 1: 1000 0.100%

11. OptiSurface Design C7

12. OptiSurface - Cutill Map Cut: 180m 3 /ha Cost: $270/ha Max Cut: 0.270m C7

13. Long S ection P lot Long section plot C7 Downslope: 0.111% to 0.333%

14. Long S ection P lot C7 Downslope: 0.050% to 1.000%

15. OptiSurface - Downslope Map C7

16. Runoff Velocity Map FLOW DIRECTION C7 Rainfall: 75mm/hr Max Velocity: 0.44m/s

17. Runoff Depth Map C7 Rainfall: 75mm/hr Infiltration:0mm Max Depth: 0.170m FLOW DIRECTION

18. OptiSurface - Downslope Map C7

20. Case Study C8 – Existing C8 LS1 LS2

21. OptiSurface 2D Design C8 LS1 LS2

22. Long S ection 1 C8

23. Long S ection 2 C8

24. OptiSurface 4D Design C8

25. OptiSurface 4D Existing C8

27. OptiSurface - Cutill Map Cut: 95m 3 /ha Cost: $200/ha Max Cut: 0.163m B8&B9

28. Mass Haul Optimisation 97 95 92 95 Cut (m 3 /ha) 1.0 million 3 0.7 million 2 1.4 million 1 2.1 million 0 Mass Haul (m 3 .m) Iteration