The slowest stream velocity necessary for a stream to carry the smallest boulders is 300 cm/sec. It is a body of running water that occupies a given channel.
A stream can be defined as a body of running water that occupies a determined site in a given water channel.
A boulder refers to a large rock that is detached in a stream and it can run downstream.
Boulder clusters can be defined as a set of large rocks situated in a stream, which are capable of creating areas of reduced velocity.
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