Levees

Levees

1. ....are natural banks found either side of a river in the flood plain (although humans can make artificially higher)

   • When a river floods it deposits material like silt or alluvium
     • The largest material is dropped first as it is heaviest
       • The smallest material is carried further during floods as it is lighter. The banks grow larger over time and the material left is sorted by size (sequential deposition)