ESE 2021 Technical Quiz || Hydrographs and its Analysis

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Question 1

A mean annual runoff of 2 m³/s from a catchment of area 10 km² represents as effective rainfall of nearly:

• A530 cm
• B590 cm
• C630 cm
• D658 cm

Question 2

The land use of an area and the corresponding runoff coefficients are as follows:

What is the equivalent runoff coefficient?

• A0.15
• B0.36
• C0.40
• D0.51

Question 3

A unit hydrograph for a watershed is triangular in shape with base period of 20 hours. The area of the watershed is 500 ha. What is the peak discharge in m³/hours?

• A7000
• B6000
• C5000
• D4000

Question 4

The time of concentration at the outlet urban area catchment of 1.5 km² area with a run off coefficient of 0.42 is 28 minutes. The maximum depth of rainfall with a 50 year return period for this time of concentration is 48 mm. what is the peak flow rate at the outlet for this return period?

• A12 m³/s
• B14 m³/s
• C16 m³/s
• D18 m³/s

Question 5

Ombrometer (pluviometer) is used to measure

• Asoil moisture stress of a plant
• BRainfall depth
• CLeaf area
• DRoot zone depth

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