Stream order is the name given to the order of a stream from its start in the head waters and its linking of each of its tributaries down stream. A first order stream has no tributaries only a single channel and they are moved up the chain of order when two first order streams converge to become a second order stream.. An additional first order stream to the same channel will remain a second order. Only when another second order stream joins another second order stream, will it move up to a 3rd order stream and so forth. It took me a while to get the hang of it.
This system of stream classification was developed by Horton–Strahler and is the numerical measure of a streams branching complexity. The order of rank was first developed in hydrology by Robert E. Horton and Arthur Newell Strahle and is also referred to as the Strahler stream order and is used to define stream size based on a hierarchy of tributaries.
It is also used by Biologists and botanists to classify tree trunk, limbs, leaves etc. And further animal respiratory and circulatory systems. It's uses are many and varied, but all follow the same path.
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Alluvial / Terrace / Deep Lead Prospecting
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