长江下游安庆水道航道条件与整治方案

近期安庆水道的河床演变表明，安庆水道进出口狭窄、中间开阔，河心洲滩发育，进口主流居中。目前的河势有利于新中汊的发展，左汊航道条件有向不利方向发展的趋势。因此，需要对安庆水道实施航道整治工程，确保航道达到6.0 m×200 m×1 050 m的标准。采用二维水沙数学模型，首先，进行了控制守护方案的计算，计算结果分析表明护底带和潜坝能够较好地限制新中汊分流；其次，进行了各整治方案的计算，经过对比分析和综合考虑，提出了航道整治控制守护推荐方案；再次，对推荐方案实施的航道条件变化进行了系列年计算、分析，研究结果可供工程建设参考。

Waterway condition and regulation scheme of Anqing waterway in the lower Yangtze River

Anqing waterway has narrow inlet and outlet but very broad middle part, where develops sandbars. Through the river bed evolution analysis, the talweg now points to the middle of the river, beneficial to the middle branch development and detrimental to the navigation channel conditions. According to the development trend, waterway regulation is needed to ensure that the channel meets the standards 6.0 m×200 m×1 050 m. Firstly, the 2D flow and sediment mathematical model is utilized to simulate the effects of several different control- protection schemes, and the results indicate that submerged dike and bottom protection can limit the development of the middle branch effectively; then, on the basis of effect comparisons, comprehensive consideration is taken to propose a recommended control-protection; finally, the variation of navigation channel conditions is calculated and analyzed by water and sediment series, which can provide information for project constructions.