Floods: Causes and Effects

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Questions and Answers

What is the estimated cost of lost output caused by floods in the contiguous United States in 2022?

  • $26.8 billion (correct)
  • $100.8 billion
  • $50.8 billion
  • $10.8 billion

What is a floodplain?

  • A low-lying area of land adjacent to a body of water (correct)
  • A riverbed that often dries up
  • A coastal area prone to tsunamis
  • A high-lying area of land adjacent to a body of water

What is the minimum area of land that must be covered with water to be considered a flood?

  • Two acres (correct)
  • Five acres
  • One acre
  • Ten acres

Why is it often unwise to build in unmitigated floodplains?

<p>Because of the high likelihood of destruction (D)</p> Signup and view all the answers

What is a common source of flooding?

<p>Hurricanes (A)</p> Signup and view all the answers

What can happen to the water level in a flood?

<p>It can increase suddenly (C)</p> Signup and view all the answers

What is a potential benefit of flooding?

<p>Agricultural benefits (C)</p> Signup and view all the answers

What was the cost of damage caused by Tropical Storm Allison in 2001?

<p>$5 billion (B)</p> Signup and view all the answers

What is a storm surge?

<p>A pile of water pushed onto shore by the force of a storm (B)</p> Signup and view all the answers

What is the main difference between a flood and a flash flood?

<p>The size of the flood (A)</p> Signup and view all the answers

What is river flooding also known as?

<p>Fluvial flooding (B)</p> Signup and view all the answers

What is the main cause of groundwater flooding?

<p>Rising levels of groundwater due to high levels of rain or snowmelt (A)</p> Signup and view all the answers

What is sewage flooding often a result of?

<p>Blocked or inoperable sewage systems (B)</p> Signup and view all the answers

What is the purpose of levees in preventing floods?

<p>To raise the shoreline of a body of water (B)</p> Signup and view all the answers

Why can't floods be truly prevented?

<p>Because disrupting the water cycle is not possible (A)</p> Signup and view all the answers

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