Agriculture Reference
In-Depth Information
with the contour markings is to help the reader visualize the concepts
that established elevation and contours.
Figure 7.14 shows a steep constructed embankment with dashed
contour lines superimposed on the face of the slope. The contours rep-
resent three-foot contour intervals; that is, the elevation difference from
one contour to the next is three feet.
Figure 7.13 Layers of waves along a Pacific Coast repre-
senting contour lines. Each dashed line represents a hypo-
thetical contour line.
Figure 7.14 Sloped embankment with contours at 3-foot
intervals
A
Figure 7.15 consists of three dia-
grams that will help you visualize the
relation of contour line spacing to steep
and gentle slopes. The diagrams show
how close the contour lines in plan are
drawn for each slope condition. Contour
lines on a topographic or grading plan
that are close together represent a steep
slope; contour lines spaced farther apart
are less steep.
The closer contours are spaced
together, the steeper the slope, as
depicted in contour plan and section in
33
32
31
33
31
Steep
33
32
31
B
33
31
Moderate
C
33
33
32
31
31
Gentle
Figure 7.15 Example of steep (A) and less steep (B, C) slopes
represented by the spacing of contours and their correspond-
ing sections
 
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