黄河上游李家峡水库变动回水区航道整治试验研究

黄河上游李家峡水库变动回水区河段属宽浅型散乱河滩,河床冲淤多变,航槽极不稳定。根据该河段回水后的水流条件变化及河床演变规律,选取中汊左、右槽进行航道整治,采用定床模型和动床模型两种试验方法对工程后的整治效果进行对比、分析,推荐优化方案。

Test study on Waterway Regulation of Fluctuating Backwater Area in Lijiaxia Gorge Reservoir on the Upper Reach of the Yellow River

The section in the fluctuating backwater area in Lijiaxia Gorge Reservoir on the upper reach of the Yellow River is a random beach with wide but shallow water.The river bed is versatile due to washing out and silting,leading to an unstable navigation channel.Considering the current changes and evolution pattern of the river bed in the backwater area of this section,the left and right grooves at Zhongcha are chosen for dredging,2 kinds of trails,fixed bed model and movable bed model,are adopted to compare and analyze the dredging results of the project.And then,a optimal scheme is recommended.