Answer:
1. d. They carry massive amounts of sediment and thus have greater depths
2. f. All of these
3. e. National Weather Service "watch" alerts on the threat of debris flows and flash floods
4.a. The time period between the arrival of a storm and the initiation of a debris flow is typically only minutes
5. d. Move upstairs or to the roof of the home to avoid the flow
6. d. All of these
Explanation:
Debris flow is the mass movement of large sediment, boulders from a slope . Usually it is a slow movement of this sediment but rain and thunderstorm can rapidly increases the speed of movement.
Construction of dams assist to channel water rightly which is an agent of debris flow . Construction of sediment retention basin slows down sediment disintegration and movement. Construction of culverts reduces the flows devastation. Developing an early warning system also address the hazard of debris flows.
Moving upstairs or to the roof top of a house is likely to save a victim of debris flow in his or her home.
Warmer oceans temperatures lead to more evaporation and high intensity storm. Warmer air holds more water and therefore causes more rain. Drought indirectly causes fire hazard.
