拟建的某水电站考虑充分利用发电水头,开挖下游汇口导致尾水渠出口河段水位整体降低,并因此造成尾水渠体型的不足。对此,以该水电站尾水渠体型为例,采用模型试验方法,从流态衔接、充分利用水头及防沙安全三方面对其进行体型优化研究。试验结果表明,当尾水渠出口高程调整至1 848.0m后,在该水电站常年运行工况下,各项参数均能达到相对最优。 The hydropower station proposed to take full advantage of the power generation head, excavation of downstream convergence led to the exit of the tailrace river as a whole lower water level, and thus resulting in lack of tailings channel. In this regard, take the tailrace of the hydropower station as an example, using the model test method to optimize the body shape from three aspects: fluid connection, full utilization of water head and sand control safety. The test results show that when the elevation of tailrace outlet is adjusted to 1848.0m, the parameters can reach the relative optimum under the perennial operating conditions of the hydropower station.