Where am I?

• I am 3770 km long • I am the 3rd longest river in the world • I am the 10th largest river in the world• At my widest I am 1.5km wide • A drop of water falling in the source is estimated

to take 90 days to reach the mouth • I flow through 10 states • My source is in Minnesota• My mouth is in the Gulf of Mexico

Learning objective: To be able to explain why the River Mississippi floods

Key terminologyRiver engineering Hard engineering Soft engineering River capacity Velocity Discharge

The Mississippi – A major global river

Flood events

• 1993 • 2008• 2011

What can you find out about each of these

floods?

Use the 1993 flood case study

• What were the causes of the flood?

• Human? • Physical?

Add two additional images to support your notes.

• Annotate them with information from the text books:

Part 2

• Learning objectives: To be able to describe and explain different river management techniques

• To identify and evaluate the river management techniques in place on the River Mississippi

How can flood risk be managed?

Use the text book p

• Complete the flood management table

• Use the information sheet to add notes on the Morganzana Spillway

Dams on the Rhône

This is a dam generating HEP near Beauchastel.

Dams can be multi-purpose:

They hold back the spring meltwater and so stop the floods.

They release this water in the dry summer to irrigate the intensive fruit and vegetable growing areas. The water is also used for cooling in the two nuclear power plants near Genissiat – Beugy and Creys-Malville.

In addition, the dams produce hydroelectric power (HEP).

What are the disadvantages of building dams?

Floodplain zoning

The River Mississippi • Annotate the map with the locations of flood management • Colour code hard and soft engineering• Explain how the flood management decreases flooding risk

After the Lynmouth floods in 1952

revetments

widerchannel

concrete banks

Study the photograph.

Explain how the changes will help to prevent flooding.

What action was taken after the Lynmouth floods in 1952?

How should the flood risk be managed?

Which scheme received the best score? Explain why.