长江下游黑沙洲南水道河床演变及碍航特性

发布时间：2018-06-06 16:23

本文选题：河床演变 + 碍航特性　；参考：《水运工程》2017年09期

【摘要】：依据河道实测水文、地形资料对长江下游黑沙洲水道河床演变和碍航特性进行深入分析,初步提出该河段的航道整治思路。分析表明:大水年尤其是特大洪水年,河床冲淤变化相对较大,南水道过渡段左槽冲刷、右槽中下段淤积现象明显。主要原因是洪水期南水道过渡段漫滩水流增强,左槽分流沿程增加、右槽分流沿程减小,江中心滩束流作用有限,处于缓流区的右槽下段输沙能力不足,汛后冲刷不充分。航道整治的基本思路为稳定相对有利的滩槽格局,拦截漫滩水流、限制左槽的进一步冲刷发展、增强南水道右槽水流的冲刷能力。
[Abstract]:Based on the measured hydrological and topographic data of the river channel, the evolution of the riverbed and the characteristics of hindering navigation of the Heishazhou watercourse in the lower reaches of the Yangtze River are analyzed in depth, and the channel regulation ideas of the reach are put forward preliminarily. The analysis shows that the river bed scour and silt change is relatively large in the flood year, especially in the flood year, and the left channel scour and the middle and lower section of the right channel are obviously deposited in the transitional section of the southern waterway. The main reasons are that the floodplain flow increases, the left channel distributary increases, the right channel distributary decreases during the flood period, the beam effect of the river center beach is limited, the sediment transport capacity of the lower right trough section in the slow flow area is insufficient, and the scour after flood is not sufficient. The basic idea of channel regulation is to stabilize the favorable channel pattern, to intercept the floodplain flow, to limit the further development of the left channel, and to enhance the scour ability of the right channel in the south channel.
【作者单位】：南京水利科学研究院;
【基金】：国家自然科学基金资助项目(51579151;51679147)
【分类号】：TV147;U617

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