Comes from levees ans settles on the river bed
Floodwater
Crops
Eroded from land upstream
Eroded from riverbanks
It comes from other lands and comes to rest in the middle of the river
Sandy dessert
From the upstream areas and rest across the flood plain
Heavy rains
Sediment comes from areas of land upstream, and comes to rest in the floodplain
Natural levees
It comes from eroded rock and land and rests when the water receeds
Where does the sediment in a flooding river come from, and where does it eventually come to rest?
Overflowing it's banks
Upstream erosion
Lack of good containment will cause a river to flood
Heavy rains
Rich soil near rivers
Sediment
Natural levees
Heavy Rains may cause a river to flood and overflow its banks
What may cause a river to flood and overflow its banks?
For growing plants
Crops
Erosion
For storing water
Nile River
A flood plain area of land is good for growing crops
Desert
Flood plain area of land is good for building houses
Heavy rains
What is the flood plain area of land good for if it floods often?
Water
Heavy rainfall
Erosion
River valley
Heavy wind
A natural levee
Sediment
Heavy rains may cause a river to overflow its banks
"Heavy rains"
What might cause a river to overflow its banks?
Amazon River Valley
Appalatian valley
Nile River valley
Natural levee
Levees valley
Floodplain
Sediment
What valley contains a river which rises over its banks each year?
Floodwater
Very flat
Flat surface
If a river floods often, a floodplain develops
Sandy dessert
River
Natural levees
Agricultural
What type of region might a floodplain develop into if a river floods often?
Because the the sediment rich in minerals
Sandy desert
Very rich soil
Raised strips
Sediment deposits
Because of the grassy areas left over
Water in the soil
Natural levees
What makes the floodplains good for growing plants?
Plants
Crops
Very rich soil
Treasure and beans are left after water recedes
Thick layer of rich soil
Flood water
Sediment
Natural levees
What is left behind in a flood plain after the water recedes?
Floodwater
Crops
Sandy desert
Civilization
Floodplains
Waters edge
Floodplains and natural levees
Flood plain
Strong land for foundations
Banks
Rich soil and flat surface
What two geographic formation can be created from flooding rivers?
Flat plain
Floodwater
Sandy desert
Natural levee
River valley
Floodplain
Heavy rains
Levees
What forms the raised strip near the edge of a flooding river?
A flood occurs when a river overflows its banks. This might happen because of heavy rains. Floodplains In very flat regions, flood water may spread out on the surface of the land. It then slows down and drops its sediment. If a river floods often, a floodplain develops. A floodplain is an area where a thick layer of rich soil is left behind as the floodwater recedes. Thats why floodplains are usually good places for growing plants. They are very flat areas and they have very rich soils. The Nile River valley is a great example of a floodplain. Each year, the Nile River rises over its banks. This floodwater carries a lot of sediment. This sediment has been eroded off areas of land from upstream. This sediment is dropped as the water slows down after spreading across the land. What is left behind is a very rich soil. Thats why crops can be raised in the middle of a sandy desert. Natural Levees A flooding river often forms natural levees along its banks. A levee is a raised strip of sediments deposited close to the waters edge. 