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Salem Urban Growth Boundary Data
The value of trees
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Salem UGB analysis summary
Year 2001 Average Canopy Cover within Salem UGB |
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| Other Land Compositions: |
Trees: |
Tree Cover: |
| 144,934,928 (m2) |
30,829,568 (m2) |
17.54% |
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| Calculating the benefits of Salem's tree canopy. |
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| Land cover Distribution: |
9,444 acres (22%) Disturbed Land
6,062.acres (14%) Impervious Roads
16,794 acres (39%) Grass with Scattered Shrubs
7,665 acres (18%) Trees
1,221 acres (3%) Water |
Stormwater Management in: cubic feet................................. 49,959,497
(one time value) U.S. dollars..............................$99,918,993 Annual Air Pollution Removal Value in: pounds....................................517,241
U.S. dollars.............................$1,075,491
Total Carbon Stored: tons..........................................3,298
Carbon Sequestered Annually: tons..........................................25.68
Total Economic Benefit: U.S. dollars.............................$100,994,484
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a |
| Scroll down for more detailed information about the above data . |
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A |
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Area:
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67.86 sq. miles
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Q
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43,432.17 acres
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Q
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17,577.00 hectares
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Current Conditions
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Landcover Distribution:
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Percent of
Salem UGB
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A
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1,121.42 acres
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2.60%
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- Water Area (100)
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A
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7,665.10 acres
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17.79%
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- Forest Patches
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A
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16,793.75 acres
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38.98%
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- Grass w/ Scattered Shrubs
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A
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9,443.87 acres
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21.92%
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- Disturbed land (87)
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A
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2,000.04 acres
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4.64%
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- Impervious Surfaces: Buildings
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A
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6,061.87 acres
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14.07%
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- Impervious Surfaces: Paved Streets
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D
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43086.05 acres
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100.00%
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Definitions:
- Forest Patches (Wooded or forested with non-turf understory): Woods grazed but not burned, some forest litter (Fair Hydrologic Condition).
- Grass/Scattered Trees (Lawns, parks, golf courses, cemeteries, etc.): Grass cover < 50% (Poor Hydrologic Condition).
- Disturbed land - Graded, grubbed, minimal vegetation.
- Impervious Surfaces: Buildings, pavilions and other man-made structures, paved streets, open ditches.
- Sequestration: The rate at which a tree adds carbon to its biomass.
- Carbon storage: The amount of carbon stored in tree biomass.
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Ecological Benefits:
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Carbon Storage & Sequestration
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Age Distribution of Trees:
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Average or Unknown
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Carbon Storage (tons):
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3,298.29
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Carbon Sequestration (tons/year):
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25.68
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Air Pollution Removal
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Air-Quality Reference City:
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Seattle
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Contaminant:
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Lbs/Year:
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Dollar Value:
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Ozone:
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188,408.23
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578,332.02
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Sulfur Dioxide:
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81,250.09
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61,090.87
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Nitrogen Dioxide:
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0
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0
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Particulate Matter:
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203,431.83
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416,828.30
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Carbon Monoxide:
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44,150.99
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19,239.41
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Total:
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517,241.15 lbs.
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$1,075,490.61
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WW
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W
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W
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STORMWATER CONTROL:
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Avg. 2-yr, 24-hour Precip. (in.):
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4.25 inches
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Site Avg. Slope (%):
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3.59
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Rainfall Region:
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IA
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Hydrologic Soil Group:
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C
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Current Conditions
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Conditions modeled without trees
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Curve Number:
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81
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82
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Runoff Depth (in):
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2.33
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2.42
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Time of Concentration (hrs):
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13.06
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12.64
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Peak Flow (cfs):
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5,121.85
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5,406.71
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Runoff Volume (cu. ft.):
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367,850,509.47
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381,227,886.96
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Storage required to mitigate the change in peak flow (cu. ft.):
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49,959,496.63
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Construction Cost (@ $2.00/ cu ft.):
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$99,918,993.26
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Total Economic Benefit of Trees in Salem UGB
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$100,994,483.87
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