Hydrology - Rainfall-Runoff
GATE Civil Engineering · 4 questions across 3 years (2018-2023) · 8% recurrence rate
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2018–2023Difficulty mix
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All 4 questions on Hydrology - Rainfall-Runoff
A 12-hour storm occurs over a catchment and results in a direct runoff depth of 100 mm. The time-distribution of the rainfall intensity is shown in the figure (not to scale). The $\phi$-index of the storm is (in mm, roun...
The hyetograph in the figure corresponds to a rainfall event of 3 cm. If the rainfall event has produced a direct runoff of 1.6 cm, the φ-index of the event (in mm/hour, round off to one decimal place) would be
During a storm event in a certain period, the rainfall intensity is 3.5 cm/hour and the Φ-index is 1.5 cm/hour. The intensity of effective rainfall (in cm/hour, up to one decimal place) for this period is
The total rainfall in a catchment of area 1000 km², during a 6 h storm, is 19 cm. The surface runoff due to this storm computed from triangular direct runoff hydrograph is 1×10⁸ m³. The $\phi_{index}$ for this storm (in...