What happens when a river floods? How are natural levees created?
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Answer 1

Answer:

The Environment Agency is responsible for flood risk management activities on main rivers, regulating reservoir safety, and providing river flood warnings. It has powers to undertake work on main rivers to fix flooding issues.

The natural movement of a body of water pushes sediment to the side, creating a natural levee. The banks of a river are often slightly elevated from the river bed. The banks form levees made of sediment, silt, and other materials pushed aside by the flowing water.

Natural levees raise the height of the stream channel, reducing the amount of flooding that will occur on the floodplain. Point bars are depositional features located along the outer portions of meander bends.

Explanation:

A flood occurs when a river or stream overflows its banks. Seasonal floods are the norm in many rivers, for example when spring rains or snowmelt increase the flow. During a flood, the channel is completely filled and water moves onto the floodplain and slows down. As it slows, it can carry less material. A lot of sand, silt, leaves, and other materials that were carried while the water was swirling along in the channel are dropped on the floodplain.

If a river has levees on only one side, some water is pushed across the river, flooding unprotected areas even more. ... In both cases, the water backs up, adding extra risk to nearby unprotected land upstream of the levee. Scientists consider it a given that levees make flooding worse.


Related Questions

What is the use of science and technology?

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Answer:

Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.

It’s a lot of useful things you use science and technology for . Science contributes to technology in many ways. One way is you can learn new knowledge which serves as a direct source of ideas for some new technological possibilities. The second way is it can be a source of tools and techniques for more efficient engineering design and a knowledge base for evaluation of feasibility of designs. One of the last things are research instrumentation.

Brief description computers and how it has evolved over the years.
IN YOUR OWN WORDS PLZ :)

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Answer:

Computers have evolved and advanced significantly over the decades since they originated. Many years ago, in their most rudimentary form, computers were very large and slow. Gradually, computers have become smaller and faster, enabling people to use them virtually anywhere.

What state in the United States lies to close to Australia ?

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The closest USA state to Africa is Hawaii

Las zonas industriales del país requieren de productos energéticos como el petróleo, que se extrae de…

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Answer:

Explanation:

Crude oil

yeah please help me I’ll give brainliest

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Answer:

Responding to the environment

Explanation:

I say this is the answer because ran and they responded to the environment by, sweating and wanting to drink water.

Hope this helps and pls mark me brainliest:)

Answer:

Responding to the environment

Explanation:

✌️❤️✌️

The Cocos Plate is located at the following approximate latitude and longitude:

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2,900,000 km2. Movement1, north-east. Speed1, 67 mm/year.

find the area of the circle. the radius 6 cm

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Answer:

A≈113.1cm²

Explanation:

Solution

A=πr^2=π·6^2≈113.09734cm²

How can brain drain affect home countries?

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Answer:

Brain drain is one of the earliest phenomena associated with globalisation, which has significant adverse effects at the local level.

The departure of skilled workers can weaken developing countries, especially smaller ones, by depriving them of important skills and workforce.

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