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Influenced by terrain and construction costs, the water flow of the flood drainage ditch outside the surrounding wall of the construction project in hilly regions should be minimized as much as possible. However, the capacity of existing or planned small reservoir in the low-lying areas of mountain flood gully outside the walls of construction projects is usually small and difficult to expand, which cannot meet the normal requirements of reservoir flood control. Aiming at this kind of engineering technical problems, this paper proposes a technical scheme with the construction of a small empty reservoir for flood prevention and drainage in construction projects. Compared with the normal reservoir flood regulating system, the storage capacity in this system can be greatly reduced, and the downstream flow reduction requirements can be met. The function and design points of the empty storage capacity peak cutting and flood regulating system are elaborated in detail combined with the actual engineering cases, which aim to provide important technical support and experience for the flood prevention and drainage project of small watershed in mountain and hilly regions.
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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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