近期三门峡水库运用的几个问题讨论

The Discussion of Some Problems on Sanmenxia Reservoir Operation

本文针对近期潼关高程居高不下 ,下游河槽萎缩等问题 ,根据实测资料分析得出 :潼关高程升高对库容损失影响不大 ,科学进行水库调度 ,改善库区冲淤分布 ,可以进行综合利用 ;三门峡水库“蓄清排浑”运用 ,对下游河道的冲淤影响 ,经历了减淤和增淤两个阶段 ,近期水库汛期采用“洪水排沙 ,平水发电”运用 ,初步分析对下游河道有一定的减淤作用。

In accordance with the situation that the bed elevation at Tongguan occupies steadily a higher position in recent years and river channel of downstream is shriveling,from systematic analysis on the measured data, it can be seen that the effect of bed elevation raising at Tonggguan on the loss of reservoir capacity is not important. To operate the reservoir scientifically and improve the scouring and silting distribution in it, the comprehensive utilization of the reservoir can be realized.\;As the Sanmenxia Reservoir was operated as“storing clear water and releasing muddy”,the erosion and deposition in lower reaches of the Yellow River experienced two stages of increasing and reducing of sedimentation. In recent years the operation mode of “sediment sluicing in flood periods and power generation in median flow periods' at Sanmenxia Reservoir is adopted, its effects on reducing of sedimentation in the lower reaches of Yellow River is analyzed.