1. 3. Landforms resulting from
deposition: Levees & Floodplains

2. 3. Landforms resulting from
deposition:
• Levees & Floodplains

4. Floodplain & Levees Formation
Floodplains and leveés are formed by deposition in times of river
flood. The river’s load is composed of different sized particles.
When a river floods it deposits the heaviest of these particles
first as it does not have sufficient energy to carry them far
away from the channel. The larger particles, often pebble-sized,
form the leveés. The sands, silts and clays are similarly sorted
with the sands being deposited next, then the silts and finally
the lightest clays. Every time the river floods deposition builds
up the floodplain.

5. Floodplain at Abergavenny

6. Levees

7. 3. Landforms resulting from
deposition: Levees & Floodplains
• _________ conditions – water contained in the
channel
• Flood conditions – Water floods onto the ____ land
adjacent to the river and ___________ material.
_________ sediment is deposited first because the
river lacks energy. Then lighter sediment is carried
________ across the flood plain as the ______
requires less _______ to move lighter sediment.
• Further Flat Heavier Normal
Deposits Energy River