Question

The diagram below shows stream gradient. If a stream has a horizontal distance of 20 km and begins at an elevation 100 m higher than where it ends, what is its stream gradient?

A. 20 km + 100 m = 120 km/m

B. 100 m / 20 km = 5 m/km

C. 100 m × 20 km = 2000 m/km

D. 20 km / 100 m = 0.20 km/m

Answer 1

B

Step-by-step explanation:

Apexs

Answer 2

Horizontal Distance = 20 km = 20,000 m
Vertical Distance ( elevation difference ) = 100 m
Stream Gradient = Vertical Distance / Horizontal Distance =
= 100 m / 20 km = 5 m / km
The height is 5 m lower for every km of horizontal distance.
Answer:
B . 100 m / 20 km = 5 m / km