Landform of Deposition: Levees

A Feature of Deposition

Levees

 

  • My favourite landform of deposition is Levees.
  • I think it’s the most straightforward landform of deposition to learn and the diagram is relatively easy to draw too.
  • Learn off the following 13 SRP’s and you should be able to answer a question regarding a depositional landform on the day of the exam (Leaving Cert). 

1. A levee is essentially a wide elevation of sediment that has been deposited on the banks of a river.

2. Levees are oftentimes found in the mature stage of the fluvial process.

3. River deposition happens when the river slows down and loses its ability to carry its load. 

Stage 1.

 

4. The river may slow down due to flooding for instance.

5. The rivers rate of flow will increase in time of flood and as a result will burst its banks.

6. The rivers water will overflow on to the rivers flood plain.

7. When the flooding stops and the rivers normal flow resumes, the rivers flow will slow down again.

8. The river will then deposit its load onto the floodplain.

9. Heavier pebbles/stones are then deposited first. These are generally placed closest to the rivers bank.

10. The finer sediment is carried further than the heavier pebbles and rock, away from the river and further into the flood plain.

 

Stage 2.

 

11. This natural process is repeated and levees form.

12. Levees are a natural construct and can help protect the river from flooding damage by encouraging the water to stay within the rivers channel at times of flooding.

 

Stage 3.

 

13. Example of a Levee: The River Nore, Kilkenny.

 

Key Terms:

 

  • Fluvial Deposition
  • Mature Stage
  • Rate of Flow
  • Sediment
  • Banks
  • Flood plain
  • Alluvium
  • Load

 

Relevant Exam Questions:

 

  1. Examine the impact of the processes of deposition on the formation of one fluvial deposition landform you have studied. 
  2. Explain the formation of one landform of deposition you have studied. 

 

*If you have any questions please contact me via the Lee Tutorials’ Instagram page.