新疆克孜尔水库异重流运行时间的计算

Study on the Elapsed Time Calculation of Density Current in Kizil Reservoir

为了使水库利用异重流进行排沙工作时排沙效率最大化,准确把握何时开启泄水闸门进行排沙工作,提出了基于入库段单宽流量、含沙量及库底坡降之间的均匀异重流流速关系式,建立了异重流自入库运行至大坝的时间计算公式。同时,通过克孜尔水库异重流实测资料,对提出的异重流运行时间公式中的库容系数进行了率定,为水库排沙减淤工作提供了理论依据。

In order to maximize the sand removal efficiency by using the density current,it is quite important to know exactly when to open the drain valve.This paper presented a formula for uniform density current velocity based on single discharge,sediment concentration and bottom slope during the storage period.Also,it was established the time calculation formula for the operation of density current from the warehouse to the dam.At the same time,through the measured data of density current in Kizil reservoir,the coefficient of storage capacity in the proposed formula of the density current elapsed time was calibrated,which provided a theoretical basis for sediment discharge and desilting work.