论文部分内容阅读
从理论上证明紧靠水库下游河道的排沙比与水库排沙比有密切关系,并且几乎是单值的函数。利用三门峡水库20年运行资料,建立了其排沙比与下游河道排沙比的关系。同时用小浪底水库初期运用7年资料进行了检验,证明是符合实际的,进而给出了在不同来沙条件下,小浪底水库各种淤积情况时下游河道排沙比、冲刷数量、减淤比及减淤时间。下游河道排沙比与水库排沙比关系表明,河道冲刷量与减淤量均存在极大值,这表明该关系表达机理的深刻。显然这个关系对调水调沙是很重要的,可以立刻作出有效的选择。
It is theoretically proved that the sand discharge ratio close to the downstream of the reservoir is closely related to the sediment discharge ratio of the reservoir and is almost a function of a single value. Based on the 20 years’ operation data of Sanmenxia Reservoir, the relationship between sand discharge ratio and sediment discharge ratio of downstream channel was established. At the same time, it is proved that it is in line with the initial data of 7 years from Xiaolangdi Reservoir, and then it is given that the sediment discharge ratio, erosion quantity and sedimentation reduction ratio of the downstream channel under different sediment conditions, Decay time. The relationship between sand discharge ratio and sediment discharge ratio of the lower reaches of the river indicates that both the erosion amount and the amount of sedimentation have a maximum value, indicating that the relationship is profound. Obviously, this relationship is very important for water and sediment control, and an effective choice can be made immediately.