Answer :
The peak discharge determined using a typical SCS synthetic hydrograph is not able to be determined.
Given data:
Area of the watershed (A) is 335ha.
Time of concentration [tex](T_c)[/tex] is 120min.
Excess rain is 32mm.
The excess rain is termed to be the runoff of the rain water which happens when the absorption of water by the soil reaches the maximum level.
The peak discharge is calculated from [tex]Q_p = (C_i *A)/T_c[/tex].
On conversion of units,
[tex]1ha =10000m^2[/tex]
[tex]1mm = 10^{-3} m[/tex]
Calculation of peak discharge:
[tex]Q_p =(C*10^{-3} *335 *10^{4})/120*60[/tex]
To find the value of C, additional information such as land use, soil type, and slope. The runoff coefficient varies depending on these factors.
Therefore, the exact value of the peak discharge is not able to be determined.
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