Q2- The observed stream flow and rainfall data are tabulated below. The catchment area is 282.6 km2. Using the straight line method for base flow separation. Time from 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12pm start of rainfall (hr) Observed 150 150 350 800 1200 900 750 550 350 225 150 150 Hydrograph (m3/s) Time (hr) Observed Rainfall (cm/hr) 1am-2am 2am-3am 3am-4am 4am-5am 0.25 2.75 2.75 0.25 i. Estimate the volume of direct runoff. Determine the excess rainfall (Effective Rainfall). Determine Ø-index. Determine lag time. ii. iii. iv.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
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Q2- The observed stream flow and rainfall data are tabulated below. The catchment area is 282.6 km2. Using the straight line
method for base flow separation.
Time from
1pm
2pm
3pm
4pm
5pm
брт
7pm
8pm
9pm
10pm
11pm
12pm
start of
rainfall
(hr)
Observed
150
150
350
800
1200
900
750
550
350
225
150
150
Hydrograph
(m3/s)
Time (hr)
Observed Rainfall (cm/hr)
1am-2am
2am-3am
3am-4am
4am-5am
0.25
2.75
2.75
0.25
i.
Estimate the volume of direct runoff.
Determine the excess rainfall (Effective Rainfall).
Determine Ø-index.
Determine lag time.
ii.
iii.
iv.
Transcribed Image Text:Q2- The observed stream flow and rainfall data are tabulated below. The catchment area is 282.6 km2. Using the straight line method for base flow separation. Time from 1pm 2pm 3pm 4pm 5pm брт 7pm 8pm 9pm 10pm 11pm 12pm start of rainfall (hr) Observed 150 150 350 800 1200 900 750 550 350 225 150 150 Hydrograph (m3/s) Time (hr) Observed Rainfall (cm/hr) 1am-2am 2am-3am 3am-4am 4am-5am 0.25 2.75 2.75 0.25 i. Estimate the volume of direct runoff. Determine the excess rainfall (Effective Rainfall). Determine Ø-index. Determine lag time. ii. iii. iv.
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