online_standard_contracted_rectangular:   Discharge through a standard contracted rectangular weir Formula: Q = 3.33 (L - 0.2 H) H3/2          [in U.S. Units] Head H on the weir, in m [or ft] Length L of the weir, in m [or ft] Height P to the weir crest, in m [or ft] Side width b, in m [or ft] Discharge Q  in L/s [or cfs] See USBR Manual for general methodology INPUT DATA:       [Description] Select Units:      SI (metric) U.S. Customary Head H :         [ H > 0 ] Length L :         [ L > 0 ] Height P :         [ H > 0 ] Width b :         [ b > 0 ] OUTPUT: Warning:  Ratio P/H = 0 < 2. Warning:  Ratio b/H = 0 < 2. Warning:  Ratio L/H = 0 ≤ 3. Discharge  Q :   0     Your request was processed at  11:39:00 pm on June 8th, 2026   [ 260608  23:39:00 ]. Thank you for running   online_standard_contracted_rectangular   Please call again.   [131103]