  When a fluid jet strikes an inclined solid surface at normal incidence,
gravity creates a flow pattern with a thick outer rim resembling a parabola and
reminiscent of a hydraulic jump. There appears to be little theory or
experiments describing simple aspects of this phenomenon, such as the maximum
rise height of the fluid above the impact point, and its dependence on jet
velocity and inclination angle. We address this with experiments, and present a
simple theory based on horizontal hydraulic jumps which accounts for the rise
height and its scaling, though without describing the shape of the parabolic
envelope.
