Target Assessment Flashcards
people, property, or activities that could be injured, damaged, or disrupted by a tree failure.
Target
the monetary worth of something; the importance or preciousness of something.
Target Value
the area where a tree or tree part is likely to land if it were to fail.
Target Zone
target that cannot be easily relocated.
Static Target
target that can be relocated.
Movable targets
a target that is in motion or intermittently moving.
Mobile Target
the amount of time targets are within a target zone.
Occupancy Rate
a target is present at nearly all times, 24 hours a day, 7 days a week.
Constant Occupancy
the target zone is occupied for a large portion of the day or week.
Frequent Occupancy
the target zone is not commonly used by people or other mobile/movable targets.
Rare Occupancy
structures, trees, branches, or other factors that would prevent or reduce harm to targets in the event of a tree failure.
Protection Factors
a delay or interruption of progress or continuity.
Disruption
personal injury, property damage, or disruption of activities due to the failure of a tree or tree part.
Consequences of Failure
the amount or extent of injury, damage, or disruption.
Degree of Harm
a process for classifying targets according to importance or value.
Stratifying targets
a process for ranking targets according to importance or value.
Prioritizing targets
a process for ranking targets according to importance or value.
Prioritizing targets
True/False
Mobile targets always have a frequent occupancy rate in the target zone.
False
True/False
Occupancy rates of targets might fluctuate with the seasons.
True
True/False
The target zone for a whole-tree failure on level ground is approximately equal to the height of the tree, but if the tree is dead and/or brittle, the target zone should be expanded to 1.5 times the tree height.
True
The likelihood of impact is __________ if the chance of the failed tree or tree part impacting the specified target is remote.
very low
The __________ is high if the failed tree or tree part is likely to impact the target.
likelihood of impact
The consequences of failure are __________ if there will be no personal injury, low value property damage, or disruptions that can be replaced or repaired.
negligible
Targets can be __________ or __________ based on importance or value, which can be useful for municipalities managing large tree populations.
stratified
prioritized
On a public estate property, it might be practical to __________ access to the target zone, in order to reduce the occupancy rate of people.
restrict
Branches low on the trunk can slow or stop the fall of branches from higher in the crown and serve as __________ to targets below.
protection factors
A person walking through a park is defined as a target that is
A) static
B) movable
C) mobile
D) dynamic
C) mobile
Cars parked at a busy shopping center from 07:00 to 22:00 have a frequent
A) target zone rate
B) target likelihood
C) occupancy rate
D) impact likelihood
C) occupancy rate
The force of impact of a large tree or tree part could be minor if
A) the distance of fall is very short
B) other trees or tree parts serve as protection factors
C) the target is very close to the tree or tree part
D) all of the above
D) all of the above
The exposure time of mobile targets in the target zone depends on all of the following EXCEPT
A) how fast the target is moving
B) whether they are likely to be stationary for a period of time within the target zone
C) the size of the target zone
D) the presence of structure or branches protecting the target
D) the presence of structure or branches protecting the target
Which of the following is NOT an example of how adjacent trees can influence the consequences of failure?
A) a large tree falls against another tree causing one or more sequential tree failures
B) root decay spreads through root grafts from an adjacent tree
C) a tree falls into an adjacent tree, preventing it from impacting a building
D) a limb falls during a storm and is deflected by another tree, causing it to miss a target
B) root decay spreads through root grafts from an adjacent tree
