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Stream capture is a geological event, geological
phenomenon or hydrological phenomenon which
occurs when a stream from a neighboring drainage erodes through the divide between two streams and "captures" another stream which then is diverted from its former bed and
now flows down the bed of the capturing stream.
One instance of a stream capture is the capture of the Rio Grande which
before capture flowed into a closed
basin, Lake Cabeza de Baca, but after capture flowed into the Gulf of
Mexico.
A stream capturing currently developing in Germany is the
Donauversickerung, where a big portion of the upper parts of the Danube river
sink into the limestone bedrock, and resurface in the Aachtopf spring, a tributary
to the Rhine river.
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