New Westminster Environmental Almanac (2917 ... - Douglas College
New Westminster Environmental Almanac (2917 ... - Douglas College
New Westminster Environmental Almanac (2917 ... - Douglas College
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One green ash<br />
tree-LAI of 5<br />
Trees with<br />
LAI of 8<br />
35<br />
Parks and Greenspaces<br />
Table 1. Air pollution reduction and other benefits to the environment<br />
based on different tree species.<br />
Trees with<br />
LAI of ~ 4.5<br />
Trees with<br />
LAI of ~ 4<br />
Trees with<br />
LAI of ~<br />
3.5<br />
Energy<br />
cooling KWh<br />
savings $201.000 $321.6 $180.9 $160.8 $140.7<br />
Heating Mbtu<br />
savings $8.300 $13.28 $7.47 $6.64 $5.81<br />
PM10 (kg.)* 0.945 1.512 0.8505 0.756 0.6615<br />
Ozone (kg)* 0.297 0.4752 0.2673 0.2376 0.2079<br />
Nitrogen dioxide<br />
(kg)* 0.320 0.5112 0.28755 0.2556 0.22365<br />
Sulfur dioxide<br />
(kg)* 0.806 1.2888 0.72495 0.6444 0.56385<br />
Carbon monoxide<br />
(kg)* 0.072 0.1152 0.0648 0.0576 0.0504<br />
Carbon dioxide<br />
(kg)* 164.250 262.8 147.825 131.4 114.975<br />
Hydrology (litre)** 1125.630 1801.008 1013.067 900.504 787.941<br />
Other Benefits<br />
$US 233.800 374.08 210.42 187.04 163.66<br />
Mature Green ash have a leaf area index (LAI) of 5. Lombardy poplar<br />
have an LAI of 8. Urban trees with an approximate LAI of 4.5 are Norway<br />
maple, little leaf linden, European mountain ash, and horse chestnut.<br />
Black locust, silver maple, lime linden, English oak, sycamore are<br />
trees having an approximate LAI of 4. Common ash, Malus spp., and<br />
white willow are examples of species with an LAI of approximately 3.<br />
(*) amount of pollutant removed from atmosphere per year<br />
(**) amount of runoff avoided and saved per year
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