Field verification of analytical at-a-station hydraulic-geometry relations

•Analytical expressions for at-a-station hydraulic geometry (AHG) predict observed AHG.•Power-law fits to hydraulic relations are highly variable.•Geometry is characterized by bankfull width, maximum depth, and a shape exponent.•Some aspects of AHG are strongly inter-correlated (e.g., bankfull width and the width coefficient).