HEC RAS Software, Draw an Open Channel of 300 m - Engineering Assignment Help

Assignment Task

1. In HEC RAS software, draw an open channel of 300 m having eight cross-sections shown in Figure 1. Simulate the water levels throughout the channel for the
estimated flow shown in Table 1. Initially, Manning’s n for the main channel and floodplains are 0.03 and 0.10 respectively. If the channel bottom is changed to concrete (n = 0.013) from chainage 125 to 150, compare the flood levels of the section.

Table 1: Peak discharge from XP RAFTS
5th Numeral (from Left) in your Student Number

Peak discharge (m3/s)

10 year ARI 50 year ARI
0 15 25
1 18 23
2 16 26
3 13 24
4 12 25
5 18 26
6 20 28
7 22 30
8 24 32
9 25 35

Show the flood profile along the channel. Also, mention the flood levels in the two lower most sections. Please be noted that for the cross-sections mostly height and width values are given. Regarding RL, ONLY for the channel bottoms are provided.

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