Table 1 shows the direct runoff observed at the outlet of a 75-acre watershed. Corresponding gross rainfall hyetograph plotted based on recorded rainfall is given in Figure 1. Use these records and SCS method to calculate and plot the excess rainfall hyetograph in 1-hr time intervals. Table 1: Direct runoff 3.25 Average DRO (cfs) Time interval 3.00 (hr) 2.75 6:00-7:00 2.50 7:00-8:00 25 2.25 8:00-9:00 70 2.00 9:00-10:00 Student ID 1.75 1.50 1250 85 1.25 10:00-11:00 1.00 11:00-12:00 60 0.75 12:00-13:00 40 0.50 13:00-14:00 25 0.25 14:00-15:00 15 0.00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 15:00-16:00 8 Time (hr:min) 16:00-17:00 3 17:00-18:00 Figure 1: Gross rainfall hyetograph Rainfall (in/hr)
Table 1 shows the direct runoff observed at the outlet of a 75-acre watershed. Corresponding gross rainfall hyetograph plotted based on recorded rainfall is given in Figure 1. Use these records and SCS method to calculate and plot the excess rainfall hyetograph in 1-hr time intervals. Table 1: Direct runoff 3.25 Average DRO (cfs) Time interval 3.00 (hr) 2.75 6:00-7:00 2.50 7:00-8:00 25 2.25 8:00-9:00 70 2.00 9:00-10:00 Student ID 1.75 1.50 1250 85 1.25 10:00-11:00 1.00 11:00-12:00 60 0.75 12:00-13:00 40 0.50 13:00-14:00 25 0.25 14:00-15:00 15 0.00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 15:00-16:00 8 Time (hr:min) 16:00-17:00 3 17:00-18:00 Figure 1: Gross rainfall hyetograph Rainfall (in/hr)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Assume ID:116644
Transcribed Image Text:Table 1 shows the direct runoff observed at the outlet of a 75-acre watershed. Corresponding
gross rainfall hyetograph plotted based on recorded rainfall is given in Figure 1. Use these
records and SCS method to calculate and plot the excess rainfall hyetograph in 1-hr time
intervals.
Table 1: Direct runoff
3.25
Average DRO
(cfs)
Time interval
3.00
(hr)
2.75
6:00-7:00
2.50
7:00-8:00
25
2.25
8:00-9:00
70
2.00
9:00-10:00
Student ID
1.75
1.50
1250
85
1.25
10:00-11:00
1.00
11:00-12:00
60
0.75
12:00-13:00
40
0.50
13:00-14:00
25
0.25
14:00-15:00
15
0.00
5:00
6:00
7:00
8:00
9:00
10:00 11:00 12:00
15:00-16:00
8
Time (hr:min)
16:00-17:00
3
17:00-18:00
Figure 1: Gross rainfall hyetograph
Rainfall (in/hr)
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