长江口深水航道边缘水域浅点控制标准研究

On shallow spot control standard in edge area of deepwater channel in the Yangtze estuary

长江口水文泥沙条件复杂、河势多变,深水航道回淤时空分布规律复杂,航道边缘水域出现浅点难以避免。分析长江口10.0 m航道维护期及12.5 m航道试通航期的航道边缘水域浅点分布情况,初步研究航道边缘水域浅点率的影响因素,提出的长江口深水航道边缘水域浅点控制的建议标准得到采纳,取得良好的应用效果。

The hydrological and sediment conditions are complex and morphology is highly varied in the Yangtze estuary.The temporal and spatial distribution of siltation is also complex in the deepwater navigation channel of the Yangtze estuary.The shallow spots can inevitably take place at the edge of the navigation channel.This paper analyzes the distribution characteristics of shallow spots at the edge of the navigation channel during the periods of 10.0 m-water-depth maintenance and 12.5 m-water-depth trial navigation,as well as the factors that influence the occurrence of shallow spots.The quality control standard of shallow spots at the edge of the deepwater navigation channel in the Yangtze estuary is proposed and adopted,which has obtained favorable application effect.