# The peak of a flood hydrograph due to a 5 -hour storm is $670 \mathrm{~m}^{3} \mathrm{~s}^{-1}$. The total depth of rainfall is $9 \mathrm{~cm}$. Assuming an average infiltration loss of $0.2 \mathrm{~cm} \mathrm{~h}^{-1}$ and a constant baseflow of $30 \mathrm{~m}^{3} \mathrm{~s}^{-1},$ the peak discharge of the 5 -hour unit hydrograph for this catchment in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ is_____________

## Question ID - 156453 :- The peak of a flood hydrograph due to a 5 -hour storm is $670 \mathrm{~m}^{3} \mathrm{~s}^{-1}$. The total depth of rainfall is $9 \mathrm{~cm}$. Assuming an average infiltration loss of $0.2 \mathrm{~cm} \mathrm{~h}^{-1}$ and a constant baseflow of $30 \mathrm{~m}^{3} \mathrm{~s}^{-1},$ the peak discharge of the 5 -hour unit hydrograph for this catchment in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ is_____________

3537

Answer Key : (80 to 80) -

80 to 80

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A parabolic grassed water channel $8 \mathrm{~m}$ wide at the top and $60 \mathrm{~cm}$ deep is laid on a slope of $3 \%$. Assuming the value of 'n' in Manning's formula as $0.04 \mathrm{~m}^{-1 / 3} \mathrm{~s}$, the discharge capacity (in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ ) of the channel (rounded off to two decimal places) is____________ 