论文部分内容阅读
采用比尺为 1∶ 50正态动床全沙模型模拟昌马水库每年 7月份泄空冲刷过程。选择水库运用过程中两个关键性的淤积高程 ,进行对水库排沙不利的丰水丰沙年和枯水丰沙年两个水文年 7月份水沙过程泄空冲刷试验。试验结果表明 :昌马水库采用每年 7月泄空冲刷运用方式 ,可以有效地排除库内淤积 ,延长水库使用期限 ;泄空冲刷初期排沙洞和下游河床有暂时性淤积发生 ,随着水库排沙率的降低 ,这种淤积将逐步消失 ;泄空冲刷过程结束后 ,下游河床不会发生淤积抬升。最后通过同已成类似水库的对比 ,从另一方面证明了昌马水库运用方式和试验的合理性
The 1: 50 normal moving bed sand model was used to simulate the discharge process of Changma Reservoir in July each year. The two key siltation elevations in the process of reservoir utilization are selected to carry out the scouring and erosion test of the sediment discharge in July during the two hydrometric years, ie, the Fengsha years, which are unfavorable for sediment discharge, and the Fengsha period. The test results show that the Changma reservoir adopts the method of scouring and emptying in July each year, which can effectively eliminate the siltation in the reservoir and prolong the service life of the reservoir. In the initial stage of the scouring and erosion discharge, the sediment deposition and the downstream riverbed have a temporary sedimentation, Lower sediment rate, this siltation will gradually disappear; venting scouring process is completed, the downstream river beds will not occur siltation uplift. In the end, through the comparison with the similar reservoirs, it proves the rationality of the operation mode and test of Changma reservoir on the other hand