When a river loses energy, it will drop or deposit some of the material it is carrying.
- Deposition may take place when a river enters an area ofshallow wateror when thevolume of water decreases- for example, after a flood or during times of drought.
- Deposition is common towards theend of a river's journey, at the mouth.
- Deposition at the mouth of a river can formdeltas- for example, theMississippi Delta.
Examples of depostion are levees and floodplains.
Levee- when a river is about to flood, the water is at the top of the river and the fastest part of the river is the middle. This means the middle has more energey, therefore can carry more sediment. When the river is absolutely full, the top layer of water and sediment cascades over the side causing the sediment to be deposited causing a levee.
Floodplain- before a river floods, the floodplain is bumpy. After the river floods, the sediment is deposite onto the floodplain, evening it out. Also, any water that is left over will eventually evaporate and will also leave sediment behind.
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