October 2010 Mission – The Rivers



Rivers are the arteries of our planet

The steady flow of clean, fresh water is an essential element for vast ecosystems and the health and survival of billions of people.

A river may have its source in a spring, lake, from damp, boggy places where the soil is waterlogged, from glacial meltwater, or simply from rain flowing off impermeable rock or man-made surfaces. Almost all rivers are joined by other rivers and streams, termed “tributaries’, the highest of which are known as headwaters. Water may also be recruited to a river from ground-water sources.

Floodplains and deltas
A river’s water is generally confined to a channel, made up of a stream bed between banks, but in larger rivers there is also a wider floodplain shaped by flood-waters over-topping the channel.
Flood plains may be very wide in relation to the size of the river channel. This distinction between river channel…

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