水库冲刷漏斗试验研究

探讨了特定河道条件(近坝段地形狭窄)下的水库冲刷漏斗形态问题。通过对宝石水库冲刷漏斗的试验分析认为，在边界条件限制下，冲刷漏斗将呈现二维结构，淤积三角洲基本向坝前平行推进。随水库运行排沙水位的抬高，水库淤积增多，三角洲洲面高程增大，但底孔冲刷漏斗形态、位置基本不变，同流量下淤积上升过程形成的淤积体高程较水位回降时形成的淤积体高程低。相同排沙水位情况下，出库流量越大，淤积高程越低。通过与其它水库冲刷漏斗试验及原型观测资料的比较，确定了宝石电站水库冲刷漏斗纵坡等形态参数，得出了一些对多沙河流水库调度有一定参考价值的普遍性结论。

Experimental Study on Reservoir Scour Funnel of Baoshi Water Power Station

In the paper, funnel configuration under specific geomorphy condition, (with a narrow reach near the dam)is studied. According to the tests,the scour funnel would be two-dimensional feature under the specific condition.The deposit material transport to the dam synchronously.At the same time,with the increasing of the operating water level,sediment deposit would increase,and the deposit area would expand, but the configuration and the situation of the funnel would not change. As the deposit depth was compared,deposit depth formed by low operating water level would be less than the one shaped by the water dropped back to the low level from a high level. And the larger the sediment outflow solar foramen, the less the level of deposit depth. When the data from other scour funnel tests and prototype observation were compared,comprehensive estimation about Baoshi reservoir is derived.Some generalized conclusions about scour funnel are derived, which are helpful for scheme optimization of reservoir regulating on heavy sediment-laden river.