Rectangular channel area

Calculates rectangular channel wetted perimeter from width and depth.

Calculates rectangular channel hydraulic radius from width and depth.

Calculates hydraulic radius from flow area and wetted perimeter.

Calculates critical depth from flow rate and rectangular channel width.

Calculates sequent depth and energy loss for a rectangular hydraulic jump.

Calculates open-channel flow with Manning equation from area, hydraulic radius, and slope.