考虑下游库水位变化的街需水电站截流风险分析

Risk Analysis of the Closure Construction of Jiexu Hdropower Station under Impact of Changes in the Downstream Reservoir Water Level

根据电站运行要求,确定下游库水位波动范围,并利用DHI Mike 21得到相应的龙口下游水位,采用水力学方法计算不同下游水深对应的龙口最大流速,用截流标准表征截流风险,反映下游库水位变化幅度对截流风险提高或降低的程度,引入工程案例验证了计算模型的可靠性和合理性,计算结果证明了工程方法的可行性。

Based on DHI MIKE,the downstream water level of closure gap is calculated with the database of the range of water level of the downstream reservoir according to its operational requirements,and the velocity of closure gap is calculated by hydraulic calculation methods.Closure risk is represented by closure standard,which can reflect the degree of the impact of change of the downstream reservoir water level on closure risk.An engineering case is introduced to verified the reliability and rationality of the calculation model,and the calculation results reflect the feasibility of the engineering method.