Cutblock Design Strategies
Openings Parallel to Prevailing Winds
- Reducing the length of the opening parallel to wind direction reduces
wind loading on trees at the downwind boundary, thereby reducing treatment
- While results vary for different studies, to maintain a sheltering
effect, the opening length should be less than 5 tree lengths.
Openings Perpendicular to Prevailing Winds
- Reducing the width of the opening perpendicular (at right angles)
to wind direction also affects wind loading on trees at the downwind
- A sheltering effect occurs for openings narrower than 1.5 tree lengths.
- Between 1.5 and 4 tree lengths wide, there is a funnelling effect.