Answer:
E. Debris flows move faster.
Explanation:
As debris flow is a moving mass of sand, soil, silt under the influence of gravity which upon rainfall moves with a lot of force. As the steep slopes, the speed can reach up to 100 miles i.e 160 km/hr. Debris flows are accelerated downhill by gravity and tend to follow steep mountain channels that debouche onto alluvial fans or floodplains.
Answer:
The correct answer is B. Debris flows usually carry boulders
Explanation:
Flash flood is a flood that is in an area with a low surface and as a result of continuous rain falling and occurs suddenly in a swift and rapid flow. This flood also carries other materials with a size of gravel, stone, to large objects such as wood and even trees.
Debris flow is a form of rapid mass movement in which a mixture of loose soil, rocks, organic matter, air, and water moves like slurry that flows on a slope. Debris flow is usually caused by intense surface water runoff, due to heavy rainfall or rapid melting of snow, which erodes and mobilizes loose soil or rocks on steep slopes.
So, flash floods and debris flow are actually equally fast and depend on the location of the slope. Both also occur due to high precipitation in the upstream area. What distinguishes is the material carried where the debris flow can carry large stones because of the very high flow strength. So the correct answer is B. Debris flows usually carry boulders
Learn More
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Details
- Grade : College
- Subject : Geography
Keywords
- Flash Food
- Debris Flow
