Reservoir gate discharge curve calibration method and system based on water recession process fitting

[0040] Such as figure 1 As shown, in this embodiment, a method for calibrating the discharge curve of the reservoir gate based on the fitting of the receding water process is provided, which includes the following steps,

[0041] S1. Determine the calibration sequence of different gates;

[0042] S2. Determine the calibration sequence of different opening degrees of the same gate;

[0043] S3. Perform an error analysis on the opening and closing flow of the gate in the retreat section;

[0044] S4, using quadratic polynomials to fit the dewatering process;

[0045] S5. Back-substitution verification is performed on the calibrated leakage curve.

[0046] In this embodiment, step S1 is specifically, for different gates, the historical gate operation data of the gate with the earlier opening and closing order is more than the historical gate operating data of the gate with the later opening and closing order, therefore, the gate with the earlier opening and closing order It i...

[0065] In this example, taking the 2015-2020 Dahua Hydropower Station in the Wujiang River Basin as an example, using the gate discharge curve method described in the present invention, the discharge curve of the right middle hole of Dahua Water is studied to illustrate the effectiveness of the present invention and rationality.

[0066] Dahua Hydropower Station is the third cascade in the planning of water elevators on the main stream of Qingshui River. The power station is located in the middle reaches of Qingshui River, 2.6km below the mouth of the tributary Dumu River, at the junction of Kaiyang County and Fuquan City; the power station is 62km away from Guiyang City and 62km away from Kaiyang City. The county seat is 45km away, and it is a hydropower hub mainly for power generation. Dahua dam site controls drainage area of ​​4328km 2 , the annual average discharge of the dam site is 75.0m 3 / s, the annual runoff is 2.37 billion m 3 . The normal storage level of the re...