What is Hydraulic Radius measured in?

there isn't a measurment for hydraulic radius as far as i know and if you g on any website about it it doesnt have any measurements at the end of it.

Josh (A level geography student)

hydraulic radius has a unit as it is the ratio of c/s area to the wetted perimeter i. e.

A/P so unit of length............

thanks........jayesh gakare,(M.TECH. CHEMICAL ENGG.,IT-BHU,VNS,India.