QUESTION 1 The daily stream flow data for a particular catchment having an area of 6500 km2 are...

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Civil Engineering

QUESTION 1
The daily stream flowdata for a particular catchment having an area of 6500km² are given in the table below. Separate the baseflowusing Straight line method, Fixed base method, and recessionSeparation method.
Calculate the totaldirect runoff for each method.
Table Q1
Time
Flows, Q
(days)
(m³/s)
1
1 600
2
1 550
3
5 000
4
10 300
5
8 600
6
6 500
7
5 000
8
3 800
9
2 800
10
2 200
11
1 850
12
1 600
13
1 330
14
1 300
15
1 280

Answer & Explanation Solved by verified expert

4.3 Ratings (872 Votes)

Given dataArea of catchment 6500 km2Time daysFlows Q in m3 sec1160021550350004103005860066500750008380092800102200111850121600131330141300151280Base flow SeparationFirst of all plot the graph between discharge and the timeIhave plotted using excel sheet and attached belowBase flow separation using differentmethods1Method 1 Straight linemethodIdentify first point beginning of direct runoff and then joinwith a straight line to a point on the recession limbend of thedirect runoffFirst See Answer

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Time	Flows, Q
(days)	(m³/s)
1	1 600
2	1 550
3	5 000
4	10 300
5	8 600
6	6 500
7	5 000
8	3 800
9	2 800
10	2 200
11	1 850
12	1 600
13	1 330
14	1 300
15	1 280