三峡工程二期临时船闸引航道泥沙淤积研究

Study on sediment accumulation of temporary lock approach channel of TGP

自 1997年大江截流后 ,临时船闸运行经历了 1998丰水丰沙年和 1999丰水少沙年。通过原型观测和实船试航 ,搜集了系统的引航道泥沙淤积和流速、流态资料。实体模型试验成果与资料对比分析表明 ,实体模型关于引航道的试验成果基本合理 ,有些预测值与原型接近 。

Since the river closure of main channel of the Three Gorges Project (TGP) in 1997, the temporary lock has been operating smoothly, and it has experienced hydrologic year with abundance of water and sediment in 1998 and year with abundance of water but low sediment in 1999. Through the field observations and real ship tests, the data were collected about sediment accumulation, velocity and pattern of flow in the approach channel. Comparison between prototype observed data and model test results shows that the latter are basically reasonable, and some predicated values approximate to the former. These results have provided important basis for the design and operation of permanent navigation structures.