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In order to solve the problem of interval flow inversion of cascade hydropower stations, taking the cascade hydropower stations in the middle and lower reaches of the Dadu River basin as an example, the characteristic curve correction of the six reservoirs in the basin was carried out. In order to accurately calculate the inflow and outflow of each reservoir by correcting each characteristic curve, and make the flow inversion rate of each interval meet the requirements, four correction methods of characteristic curve correction methods were proposed with the goal of minimizing the flow inversion rate, which includes single-point discrete optimization, multi-point discrete optimization, curve cluster overall translation optimization, and distinguishing different water head/water level translation optimization. The simulation calculation shows that although each curve correction method has certain effect, the distinguishing different water head/water level translation optimization method has the best effect. After using this method to correct the characteristic curve, the interval flow inversion rates of PuSheng and GongTong decreased from 53% and 77.96% to 13.93% and 4.37%, respectively. Although the flow inversion rates in the remaining intervals has slightly increased after correction, they are all within a reasonable range. It can be seen that the curve correction method effectively reduces the inversion rate of interval flow and improves the consistency of runoff series, which can provide a data basis for the accurate water regulation of cascade hydropower stations in the Dadu River basin.
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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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