Consider the hypothetical basin given below. Each area represents one hour time interval zone

for runoff, such that runoff from area A comes to the outlet in $1$ hour, from area B in $2$ hours, etc.

Construct the surface runoff hydrograph $($SRH$)$ at outlet $G$ for the given total hyetograph which

occurred over the whole basin except zone B$.$ Take constant infiltration as $0\mathrm{.}5c\frac{m}{h}r.$