BMP - Tree Risk Assessment - 27

time or resources to respond to. For example, recently exposed forest-edge
trees may be more susceptible to failure due to increased wind exposure,
inadequate root systems, and/or changes in soil hydrology.

Wind and Weather
Most tree failures occur during storms when strong wind, rain, snow, or
ice loads exceed the tree's capacity to withstand the load. Wind speeds are
strongly affected by topography. In urban areas, wind speeds vary depending
on placement in the landscape; trees that are located on the leeward side of
taller buildings are exposed to slower wind speed than those along streets
through which wind is funneled by surrounding structures. Knowledge of
regional and local climate, wind and precipitation patterns, and observation
of specific site conditions are important in assessing the likelihood of failure.

Figure 5. Site factors that affect a tree risk assessment at this location include a history
of previous branch, trunk, and root failures; wind exposure as affected by the slope of
the land; location at the top of a hill; and saturated soil conditions that increase the
likelihood of whole-tree failure.

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BMP - Tree Risk Assessment

Table of Contents for the Digital Edition of BMP - Tree Risk Assessment

Table of Contents
BMP - Tree Risk Assessment - Cover1
BMP - Tree Risk Assessment - Cover2
BMP - Tree Risk Assessment - i
BMP - Tree Risk Assessment - ii
BMP - Tree Risk Assessment - Table of Contents
BMP - Tree Risk Assessment - iv
BMP - Tree Risk Assessment - 1
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