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A river floods when it has too much water in it, this is usually when large quantities of rain fall with its basin, most rivers have a flood plain that without interference will flood at least once a year.

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15y ago
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13y ago

at least once every 100 years

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Q: How often do rivers usually flood?
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Related questions

When and why rivers flood?

Rivers flood in the spring, after snow accumulated over the winter begins to melt. Rivers also flood after heavy rain events.


Does it flood in the rainforest?

It does not flood often as most rainforests drain quite well into major rivers, but there are times that rainfall is so great that the rivers expand greatly in width to accommodate the water. This would be flooding.


Do all rivers flood?

Not all rivers flood most ones that are on flat ground and have soil that can't absorb the water will flood


What are the three rivers frequently affected by flood?

ganga, yamuna and brahmaputra are the 3 rivers affected frequently by flood >>>>


How would you describe North Dakota's rivers?

They are often full to the brim including reservoirs. Another term often related to them is near flood stage.


What are the major countries where flood occur?

Most countries that are low lying and have rivers that flood occasionally usually have most floods. For example: Bangladesh, China, etc. Hope this helps :) .


What UK rivers flood?

Any river anywhere in the world can flood.


Can rivers over flow?

What do you mean? Like a flood? Or are you referring to the speed of the current? Yes. Rivers can flood but I hope that's not your question.


How often on average to rivers flood is it every two years?

Well, it depends on the depth of the river. If it is shallow it will flood more regularly like every 9-10 days but if it is quite deep it will flood about every month. Hope this helps!!!


Why did people build on flood plains?

Often, flood plains are where the most fertile soil is. The rich alluvial soil washes down from mountains in rivers and streams, bringing with it rich nutrients which are perfect for growing crops. Flood plains, being close to rivers, also offer easy transportation of goods up and down waterways.


Why doesnt it flood much in England?

Streams and rivers can usually cope with excess rain. However, after a prolonged period of heavy rain, rivers sometimes burst their banks and flooding occurs.


What rivers flood in Egypt?

river Nile