Question

When a contour line crosses a stream, it forms a 'V' shape. Which way does the point of the 'V' point?

• A. Parallel to the river bank.
• B. Upstream (uphill).
• C. In the direction of the wind.
• D. Downstream toward the ocean.

Answer 1

Answer:

B. Upstream (uphill).

• The Law of V’s is a geometric rule in topography. • When a horizontal contour line encounters a valley or stream bed, it must "bend" to stay at the same altitude. • Because the center of a valley is the lowest point, the line must travel "backward" toward the source of the stream (the higher ground) to find land that is high enough to match the line's designated elevation.