Public Works
How Do I...
Quick Links
|
50 Foot Riparian Data
|
The value of trees
|
Table 16
Land cover Distribution: |
176 acres (12%) Disturbed Land (Graded/Grubbed)
94 acres (6%) Impervious Roads
19 acres (1%) Impervious Buildings
585 acres (40%) Open Space/Pasture/Meadow
537 acres (36%) Forest Patches
55 acres (4%) Water
x |
Stormwater Management in: cubic feet................................. 2,615,034
(one time value) U.S. dollars..............................$5,230,068 Annual Air Pollution Removal Value in: pounds....................................98,788
U.S. dollars.............................$205,407
Total Carbon Stored: tons..........................................630
Carbon Sequestered Annually: tons..........................................4.9
Total Economic Benefit: U.S. dollars.............................$5,435,475
|
a |
| Scroll down for more detailed information about the above data . |
|
A |
|
50 FOOT BUFFER
|
3.4% of UGB
|
|
|
Total Area:
|
2.3 sq mi
|
|
|
|
595.39 sq. km (hectares)
|
|
|
|
1,471 acres
|
|
|
|
|
|
|
Landcover Composition:
|
54.55 acres
|
03.71% of 50 ft Buffer
|
- Water Area (100)
|
a
|
536.57 acres
|
36.47% of 50 ft Buffer
|
- Forest Patches
|
a
|
584.82 acres
|
39.75% of 50 ft Buffer
|
- Grass w/ Scattered Shrubs
|
a
|
175.71 acres
|
11.94% of 50 ft Buffer
|
- Disturbed land (87)
|
a
|
18.63 acres
|
01.27% of 50 ft Buffer
|
- Impervious Surfaces: Buildings
|
a
|
93.69 acres
|
06.37% of 50 ft Buffer
|
- Impervious Surfaces: Paved Streets
|
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.
a
|
|
Ecological Services:
|
Carbon Removal Benefits:
|
|
|
s
|
- Age Distribution:
|
Average or Unknown
|
a
|
s
|
- Storage Capacity (tons):
|
629.94
|
a
|
s
|
- Sequestration Rate (tons/year):
|
4.9
|
a
|
s
|
sss
|
s
|
a
|
s
|
Air Pollution Removal Benefits:
|
|
a
|
s
|
- Air-Quality Reference City:
|
Seattle
|
Dollar Value:
|
s
|
- Contaminant:
|
Lbs/Year:
|
|
s
|
- - O3
|
35,984.00
|
$ 110,455.37
|
s
|
- - SO2
|
15,517.92
|
$ 11,667.72
|
s
|
- - NO2
|
0
|
$ 0.00
|
s
|
- - PM10
|
38,853.35
|
$ 79,609.85
|
s
|
- - CO
|
8,432.38
|
$ 3,674.53
|
s
|
Totals:
|
98787.65
|
$ 205,407.46
|
|
Stormwater Runoff Control Benefits :
|
- Avg. 2-yr, 24-hour Precipitation (in.):
|
5.5
|
|
a
|
- Site Avg. Slope (%):
|
19.9
|
|
a
|
- Rainfall Region:
|
IA
|
|
a
|
- Hydrologic Soil Group:
|
C
|
|
a
|
aaaa
|
Current Conditions
|
Modeled w/out trees
|
a
|
- Curve Number:
|
82
|
84
|
a
|
- Runoff Depth (in):
|
3.53
|
3.73
|
a
|
- Time of Concentration (hrs):
|
1.06
|
0.99
|
a
|
- Peak Flow (cfs):
|
859.05
|
927.43
|
a
|
- Runoff Volume (cu. ft.):
|
18,850,537.30
|
19,923,423.74
|
a
|
- Storage required to mitigate the change in peak flow (cu. ft.):
|
2,615,033.85
|
|
Total Economic Benefit of Trees in Salem UGB
|
- Construction Cost (@ $2.00/ cu ft.):
|
$5,230,067.70
|
|
|
|
