不同特征水位对水电站库尾淤积分布模拟研究

Simulation Research on the Distribution of Sedimentation at the End of the Reservoir by Differ⁃ent Characteristic Water Level

以澜沧江流域某电站为例,针对初步拟定的不同正常蓄水位和汛期运行控制水位,采用数学模型和物理模型相互印证相互结合的方法,计算分析建库后不同特征水位对库尾淤积分布的影响。研究发现,库区淤积量随汛期控制水位和正常蓄水位的升高而增加,且汛期控制水位的影响程度相对较大;库尾淤积分布较天然情况表现为滩面淤积略有增加。研究成果可为水库特征水位选择兼顾生态保护提供依据。

Taking a power station in Lancang River Basin as an example,this paper uses a mathematical model and physical model to calcu⁃late and analyze the influence of different characteristic water levels on the sedimentation distribution at the end of the reservoir after the con⁃struction of the reservoir for the preliminary proposed schemes of different normal storage water levels and the operating water level during the flood season.The result shows that the accumulated siltation in the reservoir area increases with the increase in the operating water levels dur⁃ing the flood season and the normal storage water levels,and the influence of the operating water levels during the flood season is relatively large.The siltation distribution at the end of the reservoir presents a slight increase in siltation on the edge beach surface compared with the natural situation.The research results can provide a basis for reservoir characteristic water level selection and ecological protection.