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Based on the spillway tunnel of Kangsu Reservoir Project, the RNG turbulence model and VOF model in FLOW 3D software was used to study the flow characteristics of the spillway tunnel. The flow velocity and relative energy dissipation rate under different conditions of the original design scheme was analyzed, and compared with the model test. The reliability of the numerical simulation was verified. In view of the problems in the original design scheme, such as the water-wing in the upstream transition section of the spillway tunnel, the far drive hydraulic jump in the stilling basin, and the downstream gully flow not returning to the channel, the modified scheme was proposed. The results show that the modified scheme can effectively reduce the water wing phenomenon, and can effectively reduce the downstream gully flow velocity and the riverbed scouring by adding multi-level energy dissipation, which can provide a reference for the design.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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