2010-11-19_PERMIT FILE - C1980007 ‎(36)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 11/19/2010
• Doc Name: Surface Facilities Area and Water Tank Site
• Section_Exhibit Name: Exhibit 66 SAE Lone Pine Water Tank
• Media Type: D
• Archive: No

Table 2. "C" Factors for Woodlands
7-
Tree Canopy
Forest Litter
C.
% of Area 1/
% of Area 2/
Undergrowth 3/
Factor
100-75
100-90
Managed 4/
0.001
Unmanaged 4/
0.003 -0.011
70-40
85 -75
Managed 4/
0.022 -0.004
U nmann ed 4/
0.01 -0.04
35 -20 70-40 Managed 4/ 0.003 -0.009
Unmanaged 4/
1/ When tree canopy is less than 20 %, the area will be considered as grassland or cropland
for estimating soil loss
2/ Forest litter is assumed to be at least two inches deep over the percent ground surface
area covered
3/ Undergrowth is defined as shrubs, weeds, grasses, virtes, etc., on the surface area
• not protected by forest litter.
4/ Managed - grazing and fires controlled
Unmanaged- stands that are overgrazed or subjected to repeated burning
Table and values from USDA Technical Note Agronomy Note # 50, 1982
•
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