Table 2 Statistical table of the piecewise comprehensive roughness coefficients of the TGR.
Segment | Item | Roughness coefficient corresponding to different water discharge | ||||||
|---|---|---|---|---|---|---|---|---|
Trunk stream of the Yangtze River | ||||||||
Zhutuo-Cuntan | Water discharge | 2000 | 5000 | 10,000 | 20,000 | 40,000 | 70,000 | |
Roughness coefficient | 0.07 | 0.05 | 0.04 | 0.036 | 0.035 | 0.033 | ||
Cuntan-Qingxichang | Water discharge | 2000 | 5000 | 10,000 | 20,000 | 30,000 | 70,000 | |
Roughness coefficient | 0.045 | 0.045 | 0.045 | 0.046 | 0.047 | 0.047 | ||
Qingxichang-Zhongxian | Water discharge | 2000 | 5000 | 10,000 | 20,000 | 30,000 | 40,000 | 70,000 |
Roughness coefficient | 0.031 | 0.035 | 0.038 | 0.042 | 0.044 | 0.044 | 0.044 | |
Zhongxian-Wanzhou | Water discharge | 1000 | 3000 | 5000 | 10,000 | 20,000 | 40,000 | 70,000 |
Roughness coefficient | 0.045 | 0.042 | 0.041 | 0.040 | 0.045 | 0.045 | 0.045 | |
Wanzhou-Fengjie | Water discharge | 2000 | 5000 | 10,000 | 20,000 | 30,000 | 40,000 | 70,000 |
Roughness coefficient | 0.044 | 0.041 | 0.042 | 0.05 | 0.06 | 0.06 | 0.06 | |
Fengjie-the dam site | Water discharge | 2000 | 5000 | 10,000 | 20,000 | 30,000 | 40,000 | 70,000 |
Roughness coefficient | 0.048 | 0.048 | 0.05 | 0.055 | 0.068 | 0.073 | 0.073 | |
Jialing River | ||||||||
Beibei-Huikou | Water discharge | 500 | 1000 | 2000 | 5000 | 10,000 | 20,000 | 30,000 |
Roughness coefficient | 0.02 | 0.02 | 0.032 | 0.042 | 0.048 | 0.053 | 0.053 | |
Wujiang River | ||||||||
Wulong-Huikou | Water discharge | 100 | 500 | 1000 | 2000 | 5000 | 10,000 | |
Roughness coefficient | 0.065 | 0.06 | 0.055 | 0.05 | 0.05 | 0.05 | ||
