南水北调引江济汉工程取水口位置比选研究

Research and Comparison on the Positions of Water Intakes of the Water Transfer Project from Yangtze River to Hanjiang River for the Middle Route of South-to-North Water Transfer Project

重点研究了南水北调引江济汉工程后三峡水库运用50年内,不同取水口河段泥沙冲淤、河势、水位的变化趋势,为合理选择进水口提供了科学依据。研究成果表明,由于三峡水库的拦沙及调节作用,改变了下游河道的来水来沙条件,使下游河段冲淤发生变化,河床处在不断调整过程中。在三峡水库运用50年内,各取水口河段河床冲刷主要集中在前10年,随后出现冲淤平衡、淤积等。兴建取水口工程后,工程对河段上、下游的影响是有限的,但其影响仅限于工程附近;各取水口的取水条件,均呈现出随着三峡水库运用年限的增加而发生变化。

In this paper,the variation tendency of sediment scour and silting,river regime and water level in the reaches near water intakes of the Water Transfer Project from Yangtze River to Hanjiang River for the Middle Route of South-to-North Water Transfer Project are discussed during the fifty year＇s operation of the Three Georges Project,which can provide scientific basis for the reasonable intake choosing.Researches show that river bed of the middle and lower reaches of Yangtze River has constantly adjusted because of the operation of the Three Gorges Reservoir;during the fifty year＇s operation river bed erosion near water intakes mainly take place in the previous ten years and then the river bed in a condition of being in equilibrium and being little silting;the water transfer project has a certain effect on the reaches near water intakes while a limited effect on the river upstream and downstream after its operating;intake conditions of water intakes changes during different operation time of the Three Georges Reservoir.