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Topographic Maps and Landforms
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Grade 8
8.111 Topographic Maps and Landforms
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Route 1 crosses only two 20 m contours over 2 km. Route 2 crosses eight 20 m contours over the same distance. Why would Route 1 usually have lower erosion risk for a trail?
A
Route 1 is lower risk because it crosses more elevation change
B
Route 2 is lower risk because steep trails always drain better
C
Route 1 has a gentler grade, so runoff is less likely to rush straight downhill
D
Contour crossings do not relate to trail slope
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