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Flooding - Causes Of Floods, Hydrologic Cycle, Human Populations, Human Influence On Flooding, Weight Of Water And Force Of Floods

natural channel discharge river

Flooding, although it usually carries a negative connotation, is quite a natural process and is simply the response of a natural system (a river system) to the presence of too much water during an interval of time. Rivers and streams are governed by a simple equation, Q = A × V, where Q is discharge (amount of water), A is area of the river channel, and V is velocity. When excess discharge is present in a river or stream, at first the water moves more quickly (V increases) and perhaps some erosion of the channel takes place (i.e., A increases). If discharge (Q) increases too rapidly, however, water must move out of the channel (the confining area, [A]) and out onto the surrounding area, known as the floodplain. The floodplain is the area that floods first.

Floods are caused by a variety of factors, both natural and man-made. Some obvious causes of floods are heavy rains, melting snow and ice, and frequent storms within a short time duration. The common practice of humans to build homes and towns near rivers and other bodies of water (i.e., within natural floodplains) has contributed to the disastrous consequences of floods. In fact, floods have historically killed more people than any other form of natural disaster. Because of this fact, humans have attempted to manage floods using a variety of methods with varying degrees of success.


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about 1 year ago

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about 3 years ago

it is very helpfull getting this usefull amount of information!!

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almost 3 years ago

Just wondering when this site was last updated; for my bibliography for my yr 9 geography assignment

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about 3 years ago

it's very helpful....!!

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over 3 years ago

dis web is verygood for student who want's their goal.

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almost 2 years ago

Good job so far mara i need more information

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almost 2 years ago

Good job so far mara i need more information

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almost 3 years ago

it is our 1st grading activities in our class....it help us to gatherd information about the human causes that affect the people!!!!!nice one...:)

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about 3 years ago

i like it

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about 3 years ago

next time try and explain the causes

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over 3 years ago

We got Flooded in Stockton Mn in 2007 and we live next to a stream so all the rain that night went into the streeam which made it overflow the stream. The water was so powerful it put a hole in my grandmas drive way.

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almost 2 years ago

way a ncy ting