Causes of Flooding in the Mississippi River Basin Quiz

What was the depth of snowpack in the 2010/11 winter compared to the usual depth?

• 50% deeper

• 300% deeper

• 100% deeper

• 200% deeper

When did the delayed snowmelt occur?

• March

• April

• June

• May

How much rainfall fell in one month in May?

• Five times the average

• Four times the average

• Three times the average

• Twice the average

What is the estimated amount of forest cover lost in the Mississippi catchment area over approximately 200 years?

• 6 million hectares

• 4 million hectares

• 8 million hectares

• 10 million hectares

What was the percentage of forest cleared for agriculture in 1935?

• 50%

• 40%

• 30%

• 20%

What is the estimated amount of forest cleared for rice and soybean crops between 1950-1970?

• 4 million hectares

• 3 million hectares

• 1 million hectares

• 2 million hectares

What happened to Chesterfield Valley during the 1993 flood?

• It remained dry

• It was under 1m of flood water

• It was under 2m of flood water

• It was under 3m of flood water

What has undergone rapid development in Chesterfield Valley since the 1993 flood?

• New hospitals

• New homes

• New schools

• New parks

What is the estimated amount spent on urban development on land that was flooded in 1993?

• $4.3 billion

• $2.3 billion

• $1.3 billion

• $3.3 billion

What does increased impermeable surfaces lead to?

• Increased storage capacity of the basin

• Increased surface runoff

• Slower and lower peak discharges

• Decreased surface runoff