Streamcalc

Stream Calculator is a modification of [streamorder] and is created to assist with handling divergences. In a strict implementation of Strahler stream order, a returning divergence (such as around an island) would result in the streamorder incrementing higher.  [streamcalculator] uses the [divergence] field and sets the main path, [divergence] = 1, to the inflow [streamorder] and the minor flow path, [divergence] =2, to [streamcalculator] = 0, treating the minor divergence as a new network start.