3. For a 2 hour, 8 mm/h intensity rainfall, the hydrograph given in Table is observed. The area of watershed is 500 km² Table: Propeller readings Time 0 flow rate (m³/s) 8 2 4 6 14 18 30 8 10 12 45 38 28 14 16 18 20 22 24. 18. 14 10 a) Obtain 2 hour unit - hydrograph for the considered flow section b) Obtain 4 hour unit- hydrograph for considered flow section. c) Obtain the hydrograph of a rainfall with 4 hour duration and 10 mm/h intensity. 24 8 8

Structural Analysis
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Chapter2: Loads On Structures
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3. For a 2 hour, 8 mm/h intensity rainfall, the hydrograph given in Table is observed. The
area of watershed is 500 km²
Table: Propeller readings
Time
0
flow rate
(m³/s)
8
2
4
6
14 18 30
8 10 12
45 38 28
14 16 18 20 22
24. 18. 14 10
a) Obtain 2 hour unit - hydrograph for the considered flow section
b) Obtain 4 hour unit- hydrograph for considered flow section.
c) Obtain the hydrograph of a rainfall with 4 hour duration and
10 mm/h intensity.
24
8 8
Transcribed Image Text:3. For a 2 hour, 8 mm/h intensity rainfall, the hydrograph given in Table is observed. The area of watershed is 500 km² Table: Propeller readings Time 0 flow rate (m³/s) 8 2 4 6 14 18 30 8 10 12 45 38 28 14 16 18 20 22 24. 18. 14 10 a) Obtain 2 hour unit - hydrograph for the considered flow section b) Obtain 4 hour unit- hydrograph for considered flow section. c) Obtain the hydrograph of a rainfall with 4 hour duration and 10 mm/h intensity. 24 8 8
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