PERMFILE125190

• Permit No: C1989074
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit J Erosion Computation
• Media Type: D
• Archive: No

5
Figure 2 SLOPE-EFFECT CHART (Topographic Faclor,LS)*
zo.o
to.o
B.0
6.0
4.0
v~ 3.0
J
v 2.0
Li
U
L
a
no
a l.o
~ 0.8
0.6
o.a
0.3
0.2
20 40 60 100 200 400 600 1000 2000
Slope Length (Feel)
o.l
10
- - - - - -F - - - - - - - _ -- -I

5 ~°I0
- i - - - . .
- - -I - - Q ~ °I ° - I I ' - - r

~

-
-1
-
_I
:
i
I
- '°
~,5 O~ ~
-
-
i
~
- ~ I j _ ~ _. .

-
-~ - _- - I 9 '~ ° -
g° -
lo - ~ I I _ I
` ~
_ - . j _ _ f ~a° I0 ~ .) _ I _ ~ . . i - , ~ I r k

-
_
-
-
I
~
-
_ I _ _
_
_
6
° 0 -

° ~

I°
I
_
.
1 ~
C
_ _I
r.
. 7
I

-
-
- 6
~ - -
-
~

- -I ' I ' - - - I ~ I
- - it ~ - - q°I° - - -
i ~ l i I n I ' ~ ~ ~ I ~ ~ ~ i j I ~ I
'

~
I I 3 °I°
;
j
~~
I
'

-
i ~ ~
~

i
I
-

-
-
-
-
i°b
-
!
~ -
-
i i_

-
_-~.._
-

I
a
~ ~ ii,

~ _ -

i _ - _ - -

I
- =
- =
-
- r =1
'The dashed lines represent estimates (or slope dimensions beyond the range of
lengths and steepnesses for which data are available. The curves were derived
by the formula:
LS = ~ 72.6 /m / 430xZ6.570415 0.43
where a=field slope length in feet and
m=0.5 if s= 5%b or greater, 0.4 if s=4%,
and 0.3 if s=3°b or less; and x=sino.
o is the angle of slope in degrees.