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Appendix
B.
Slope
of Soils
Big
Darby
Creek
Headwaters Soils – Map B-1
In
Champaign
and
Logan
counties, a large number of the soils have slopes between 2 and 12 percent and
steeper slopes between 12 and 25 percent possible next to streams.
In
Union
County,
the Powell Moraine controls much of the topography.
North of the moraine a majority of soils have slopes of 2 to 6 percent,
but south of Big Darby Creek the soils only have slopes between 0 and 2 percent.
Middle Big
Darby
Creek
Soils – Map B-2
This watershed is dominated by flat to nearly flat soils.
Only 22 percent of the watershed has slopes over 2 percent.
The slopes generally increase closer to
Big
Darby
Creek. Steep slopes are common along
Big
Darby
Creek
in the southern portion of this watershed.
Little
Darby
Creek
Watershed – Map B-3
This watershed begins in
Champaign
County
with most slopes between 2 and 12 percent.
Portions of northwest
Madison
County
and southwest
Union
County,
are nearly level. The remainder of
the watershed along Little Darby Creek generally has slopes between 0 and 6
percent with steep slopes along the stream.
Lower Big
Darby
Creek
Soils – Map B-4
The lower portion of
Big
Darby
Creek
has a wide range of slopes. The
northern half of the Hellbranch watershed is nearly level whereas along the
Big
Darby
Creek, slopes greater than 25 percent are possible.
More than 3 percent of soils in this watershed have slopes greater than
25 percent, considerably more than any of the other subwatersheds.
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