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West Bank Watershed Data
The value of trees
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Table 8
Land cover Distribution: |
359 acres (25%) Disturbed Land (Graded/Grubbed)
229 acres (16%) Impervious Roads
67 acres (5%) Impervious Buildings
506 acres (35%) Open Space/Pasture/Meadow
282 acres (19%) Forest Patches
8 acres (0.5%) Water |
Stormwater Management in: cubic feet................................. 2,713,132
(one time value) U.S. dollars..............................$5,426,266 Annual Air Pollution Removal Value in: pounds....................................97,961
U.S. dollars.............................$203,689
Total Carbon Stored: tons..........................................625
Carbon Sequestered Annually: tons.........................................4.86
Total Economic Benefit: U.S. dollars.............................$5,629,954
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| Scroll down for more detailed information about the above data . |
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Total Area:
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2.27 sq. miles
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a
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587.41 sq. km (hectares)
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a
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1,451.47 acres
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Landcover Composition:
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0.56% of WEST BANK
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08.12 acres
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- Water Area (100)
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a
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19.41% of WEST BANK
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281.80 acres
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- Forest Patches
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a
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34.85% of WEST BANK
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505.90 acres
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- Grass w/ Scattered Shrubs
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a
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24.76% of WEST BANK
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359.41 acres
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- Disturbed land (87)
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4.63% of WEST BANK
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67.24 acres
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- Impervious Surfaces: Buildings
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a
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15.79% of WEST BANK
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229.23 acres
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- Impervious Surfaces: Paved Streets
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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 Services:
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Carbon Removal Benefits:
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aa
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- Age Distribution:
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Average or Unknown
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a
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- Storage Capacity (tons):
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624.67
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- Sequestration Rate (tons/year):
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4.86
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Air Pollution Removal Benefits:
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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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- - O3 (Ozone)
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35,682.94
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$ 109,531.25
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- - SO2 (Sulfur Dioxide)
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15,388.09
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$ 11,570.10
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- - NO2 (Nitrogen dioxide)
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0
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$ 0.00
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- - PM10 (particulates <10 microns)
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38,528.29
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$ 78,943.80
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- - CO (Carbon monoxide)
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8,361.83
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$ 3,643.78
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Totals:
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97,961.15
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$ 203,688.93
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A
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A
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A
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A
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Stormwater Runoff Control Benefits :
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- Avg. 2-yr, 24-hour Precipitation (in.):
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5.5
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a
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- Site Avg. Slope (%):
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19.9
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a
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- Rainfall Region:
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IA
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a
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- Hydrologic Soil Group:
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C
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a
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hh
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Current Conditions
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Modeled without trees
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a
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- Curve Number:
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85
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86
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a
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- Runoff Depth (in):
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3.83
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3.94
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- Time of Concentration (hrs):
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0.95
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0.92
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a
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- Peak Flow (cfs):
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952.17
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988.54
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- Runoff Volume (cu. ft.):
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20,194,416.53
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20,738,039.45
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- Storage required to mitigatethe change in peak flow (cu. ft.):
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2,713,132.77
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Total Economic Benefit of Trees in Salem UGB
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- Construction Cost (@ $2.00/ cu ft.):
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$5,426,265.55
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