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Article: Stream Piracy
- Article from:
- World of Earth Science
CopyrightCOPYRIGHT 2003 The Gale Group, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Stream piracy
A stream can be defined as any flowing body of
water
in a clearly defined channel. Streams may increase the size of their valleys by the
erosion
of the
soil
and
rock
surrounding their channels, either by widening their valleys or by headward erosion. In the process of headward erosion, the stream valley at the uppermost part of the stream channel is worn away, and the stream channel is lengthened in the upstream direction. Because the sides of the uppermost part of the stream valley are often steeper than the sides of the valley further downstream, the lengthening of the stream channel ...
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Dictionary definition: drainage network evolution
A Dictionary of Geography;
315 words
... ... evolution The drainage basin can increase its area and extend its channels by landslides at the edge of the network, by headward erosion , by the extension upslope of underground pipes , and by the formation of rills . There are two main theories to account ...
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