摘要
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 。
In the present paper the emptying scour process of the Changma Reservoir was simulated by the undistorted mobile sediment model of the scale 1∶50,We defined two key silting altitudes of the reservoie, and then modeled the emptying scour processes of two types of hydrological series, namely high flow and sediment concentration year, and low flow and high sediment concentration year. The experimental results indicated that if the emptying scour was employed in the Changma reservoir, the deposition in the reservoir could be efficiently driven out and the reservoir life can be extended. There was some temporary deposition in the spillway sediment tunnel and the bed of the lower reaches at the early stage of the emtying scour, but after the emptying scour process, this deposition would disappear. At last, by comparing with an analogous reservoir, the operational way of the reservoir and the validity of applicability of the models were further proved.
出处
《西北水资源与水工程》
2000年第1期22-27,共6页
Northwest Water Resources & Water Engineering
