TOPAZ: Variable detail of network and contributing area delineation

	CSA = 250 ha MSCL = 100 m
	CSA = 25 ha MSCL = 100 m

CSA (critical source area):
the threshold upslope catchment area at which a source channel or exterior link is initiated

MSCL (minimum source channel length)
the shortest source channel or exterior link permitted in the network