长江中游杨林岩水道整治措施

杨林岩水道作为长江中游典型的顺直分汊河段,多年来航道条件良好。三峡蓄水后,水沙条件发生改变,航道条件呈现不利发展趋势。以物理模型试验为手段,结合理论分析,就该水道水沙运动特性、河床演变规律、治理思路,整治方案等进行研究,为类似河段治理提供参考。研究成果认为,顺直分汊河段江心洲-南阳洲洲头位置及形态的变化直接影响河床演变和航道条件,宜遵循"采用护滩带软体排对洲头实施守护"的治理思路。

Regulation measures of Yanglinyan waterway in the middle Yangtze River

As a typical straight braided river in the middle reach of the Yangtze River, Yanglinyan waterway is well in channel condition for years. But the development of channel condition is worsening after the impoundment of the Three Gorges reservoir when water and sediment conditions were changed. This paper studies the water and sediment characteristics, riverbed evolution law, train of thought on the regulation, and regulation measures by means of physical model test and theory analysis, which may serve as reference for similar river regulations. The result shows that the location and shape changing of Nanyangzhou head directly impacts the riverbed evolution and channel condition, so the flexible mattress beach protection belts shall be adopted to protect the head.