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Hydraulic radius is defined as the area of theflow section divided by the wetted perimeter, whereas, Hydraulicmean depth is defined as the area of the flow section dividedby the top water surface width.
Regarding this, what is a hydraulic radius?
Definition of hydraulic radius. : the ratio ofthe cross-sectional area of a channel or pipe in which a fluid isflowing to the wetted perimeter of the conduit.
Subsequently, one may also ask, how do you find the hydraulic radius?
From the hydraulic radius definition:RH = A/P, where A is the cross sectional area of flowand P is its wetted perimeter. From the diagram it is clear that A= by and P = 2y + b, so the hydraulic radius is:RH = by/(2y + b) for an open channel flow through arectangular cross section.
The hydraulic diameter (aka hydraulic meandiameter) is used for a fluid flowing in a pipe, ductor other conduit of any shape. This uses the perimeter andthe area of the conduit to provide the diameter of a pipewhich has proportions such that conservation of momentum ismaintained.