An inventory of trees within the development area that collects detailed information about trees, relative to their proximity to construction.
What is a tree survey?
100
The area around a tree or a group of trees in which no grading or construction actovity may occur.
What is a tree protection zone?
100
Root injury, soil compaction, removal of leaf area through pruning, loss of rooting space, changes in soil moisture and microbiology.
What is construction damage to trees?
100
Excavating, filling and cutting.
What is grading?
100
1) invigorate tree, 2) provide clearance for construction activity, 3) protect tree from inadvertent damage during construction, 4) clear unwanted vegetation
What are preconstruction treatments?
200
1) species, 2) size, 3) health, 4) form and structure, 5) pests, 6) crown class, 7) live crown ratio, 8) crown integrity
What is information collected in a tree survey?
200
1) species sensitivity to impact
2) health and age of tree
3) root and crown conformation
4) development constraints
What are the factors needed to determine the size and conformation of the tree protection zone for a given tree?
200
root area exposed to compaction, root area covered by pavement, pruning, removal of adjacent vegetation
What are site development disturbances that may occur within rooting area?
200
Restrict stripping of topsoil around trees.
What is a method of minimizing root loss?
200
The single most important treatment for trees under water stress.
What is supplemental irrigation?
300
Species tolerance to construction impacts, tree condition and potential longevity.
What is needed to identify trees suitable for preservation.
300
1. Evaluate species tolerance of construction
2. Identify tree age
3. Use a multiplier per unit of trunk diameter to calculate the optimum radius for a tree protection zone
What is a method for calculating the optimum tree protection zone for trees?
300
Removing soil from under a tree canopy can seriously damage roots and may impair the stability of a tree.
What is a cut?
300
1) bridging over roots
2) cantilevering a structure out over a footing
3) raising a foundation with discontinuous footing
What are footing and foundation design alternatives?
300
Mulching with wood chips or crushed gravel placed on top of geotextile fabric can reduce soil compaction
What is soil and root protection?
400
A general overview of the trees that describes species composition, stocking density, diameter distribution, age class and condition at the stand level.
What is a tree stand deliniation?
400
Leaning trees, narrow-canopied trees and closely spaced trees growing in stands.
What are trees that should not use driplines for tree protection zones?
400
1) diversion of runoff to or from tree
2) installation of subdrains or drainage swales
3) altered drainage patterns increasing soil eorsion
What are disturbances to overall site that could affect tree?
400
Tunnel under woody roots larger than 2" in diameter rather than cutting them.
What is a measure to minimize root loss from utility trenching?
400
Marking the edge of an excavation, then excavating along that ine by hand or with high pressure or water, and sharply cutting roots at right angles.
What is the best method for root pruning?
500
center line of tree trunk
tree dripline
base elevation of trunk
What are measurments needed for a tree survey.
500
Trunk diameter.
What is the guideline used by the British Standards Institute to develop tree protection zones?
500
wilting
early fall coloration and defoliation
epicormic shoots
heavy seeding
What are typical symptoms of tree stress from construction injury?
500
Remove soil in radial trenches and replace.
What is a method to relieve soil compaction?
500
The single most important element to maintain, that will protect trees on construction sites.