Levees are natural embankments which are formed when a river floods. When a river floods friction with the floodplain leads to a rapid decrease in the velocity of the river and therefore its capacity to transport material. Larger material is deposited closest to the river bank. This often leads to large, raised mounds being formed. Smaller material is deposited further away and leads to the formation of gently sloping sides of the levees. High pressure, caused by a river meeting its bank-full capacity, can cause a levee to burst.
While you are here, please consider supporting A Level Geography.
If you have found this site useful please support us keeping A Level Geography free by making a small, secure donation via Paypal towards to the running costs of the site.
Find out about the characteristics of the drainage basing hydrological cycle.
Hydrographs can be used to illustrate discharge. These can be used to show annual discharge patters of flow in relation to climate.
The balance between inputs and outputs is known as the water balance or budget. The water…
There are three main types of processes that occur in a river. These are erosion, transportation and deposition.