论文部分内容阅读
利用过程响应模型试验原理,模拟了高含沙水流河道的形成过程,从平面、横断面和纵向变化3方面揭示了高含沙水流窄深河道的形成过程及河道形态特征。试验结果表明:在高含沙窄深河道形成初期,河道平面摆动剧烈,同时水流漫滩并大量淤积,河床抬高,主槽保持窄深形态;在后期,水流不漫滩和保持高含沙水流的条件下,这种单一窄深河道形态变化较小,在空间和时间上都能够相对稳定。
The formation process of river channel with high sediment concentration was simulated by the principle of process response model test. The formation process of narrow and deep river channel with high sediment concentration and the river channel morphology were revealed from the aspects of plane, cross section and longitudinal variation. The results show that in the early period of the formation of narrow and deep channels with high sediment concentration, the river plane swelled violently. At the same time, the floodplain was flooded and a large number of sediments were deposited, the river bed was elevated, and the main channel remained narrow and deep. In the later period, Under the condition of water flow, this single narrow deep channel has little change in shape and can be relatively stable both in space and time.