Curb Inlet in Sag

Curb Inlet

Curb inlets are divided into 3 categories, based on their throat geometry: horizontal (most common), vertical, and inclined, as defined in the figure below.

Curb Inlet Throat Types

h	=	Height of curb-opening inlet (m, ft)
d_i	=	Water depth at lip of curb (m, ft)
d_o	=	Effective head, measured from center of orifice throat (m, ft)
Θ	=	Throat angle for inclined-throat inlets