TM 5-814-3/AFM 88-11, Volume III
C-1. Grit chambers. (Refer to para 10-4b)
a. Weir velocity control. As stated previously in paragraph 10-4b, a proportional weir, Parshall flume
or a Venturi flume may be used for control of water velocity in grit chambers. Illustrations of these control
devices are contained in figure C-1.