Biophysical Hazard Assessment
Use the windthrow triangle to understand component hazards and to uncover
the role they play in determining windthrow risk.
The diagnostic method described below is 'observational' but includes
some elements of the empirical approach:
- The environmental factors which affect the wind loading and
wind resistance of stands can be divided into three groups: topographic
exposure, soil, and stand factors.
- These three groups or 'component hazards' form the three sides
of the 'Windthrow Triangle.' Relative biophysical hazard for windthrow
can be estimated by assessing each side of the triangle independently
and then integrating the results.
- The component hazards are assessed by asking 'diagnostic
- While the triangle approach is simplistic, it provides a framework
for the systematic observation of damage patterns and associations,
which can lead to improved predictions.
Click on the windthrow triangle graphic to uncover more information about
the relationship between these component hazards.