The ordinates of a 4-hour unit hydrograph is given below. The equilibrium discharge of the S-curve (in m³/sec) constructed from this UHG will be?

Time (hr) 0 4 8 12 16 20
Ordinate 0 34 120 82 20 0
(m³/sec)

A. 120
B. 188
C. 236
D. 256