2011 Mississippi Flood Causes CCEA AS Level

What was the depth of the snowpack in the winter of 2010/2011 compared to the average?

• 200% deeper

• 400% deeper

• 600% deeper

• 800% deeper

What caused the delay in snowmelt in the spring?

• Record-breaking snowfalls

• Cooler than average temperatures

• Intense rainstorms

• Clearing of forest

Which location experienced a peak discharge of 15 meters?

• Cairo (Illinois)

• Thebes (Illinois)

• Chesterfield valley (St. Louis)

• Cairo and Thebes

What contributed to the high discharge in the Ohio tributary basin?

• Record-breaking snowfalls

• Cooler than average temperatures

• Intense rainstorms

• Clearing of forest

How much of the forest between Cairo and the delta was cleared for agricultural use?

• 20%

• 40%

• 60%

• 80%

What effect did the clearing of the forest have on peak discharge levels?

• Decreased peak discharge

• No effect on peak discharge

• Increased peak discharge

• Stabilized peak discharge

What is the size of the area in the Chesterfield valley that experienced further urban development?

• 3 hectares

• 5 hectares

• 8 hectares

• 10 hectares

What was the reason for the decrease in infiltration and increase in surface runoff in the Missouri area?

• Record-breaking snowfalls

• Cooler than average temperatures

• Intense rainstorms

• Urban development

How much money was spent on developing previously flooded land in the Missouri area?

• $1.3 billion

• $2.6 billion

• $3.9 billion

• $4.3 billion

What effect did the factors mentioned in the text have on the total volume of discharge in the river?

• Decreased total volume of discharge

• No effect on total volume of discharge

• Increased total volume of discharge

• Stabilized total volume of discharge