Research Article
Flood Analysis with HEC-RAS: A Case Study of Tigris River
Table 2
Roughness coefficient calculation in different parts of the Tigris River.
| Manning roughness coefficient | 0 + 000.00∼6 + 000.00 km (between historical bridge and University Bridge) | 6 + 000.00∼10 + 200.00 km (between University Bridge and Sadi Bridge) |
| n0 | 0.028 | 0.028 | n1 | 0.005 | 0.020 | n2 | 0.000 | 0.005 | n3 | 0.000 | 0.000 | n4 | 0.040 | 0.045 | m | 1.150 | 1.150 | n = m(n0+n1+n2+n3+n4) | 0.08395 | 0.1127 |
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