三峡下游三斗坪水位研究

Study on Sandouping Water Level in Downstream of Three Gorges Reservoir

三斗坪水位站是三峡水库下游代表站,准确预测三斗坪水位对优化三峡电站发电计划制作和泄水建筑物闸门运行方式组合具有重要意义。以2015~2020年两坝间水位平稳时的水位流量资料为基础,分别采用单一函数法、曲线插值法和多元线性拟合法计算三斗坪水位,并分析了其影响因素。结果表明,多元线性拟合法精度更高,能够满足水库调度要求。三斗坪水位同时受三峡出库流量和^(#)5站水位影响,且相关度均很高。两坝间河势在一定程度上能影响三斗坪水位和#5站水位关系。

The Sandouping water level station is a representative station in the downstream of the Three Gorges Reservoir.Accurately predicting the Sandouping water level is of great significance for optimizing power generation plan of the Three Gorges Power Station and combination of operation mode of the gates of the discharge structures.Based on the data of the water level and flow when the water level between the two dams is stable from 2015 to 2020,the single function method,curve interpolation method and multi-variable linear fitting method were used to calculate the Sandouping water level,and analyze its influencing factors.The results show that the muti-variable linear fitting method has higher accuracy and can meet requirements of reservoir operation.The Sandouping water level is affected by both the outflow of the Three Gorges Reservoir and the^(#)5 station water level,and the correlations are very high.The river regime between the two dams can affect the relationship between the Sandouping water level and the^(#)5 station water level to a certain extent.