2017年秋汛后汉江河口段航道条件预测

Prediction analysis of navigation channel conditions in the estuary of Hanjiang River after autumn flood of 2017

通过2017年与2011年秋汛特点的对比分析,利用2011年秋汛对航道条件的影响成果,对2017年秋汛后汉江河口段航道条件进行了预测,分析表明:汉江秋汛将引起浅区内较为明显的淤积,但不会对河道形势及长期演变规律产生影响; 2017年汉江秋汛较2011年略小,预计2018年浅区段内淤积幅度略小,但局部滩段仍将出现明显碍航。随着秋汛后浅区段的淤积体的快速冲刷,将在次年调整至与一般年份一致。

The comparative analysis of characteristics of autumn floods in 2017 and 2011 and the effects of the 2011 autumn flood on the channel conditions were used to predict the channel conditions of the estuary of Hanjiang River after the fall of 2017. The analysis shows that the autumn flood in Hanjiang River will cause relatively evident sediment depostion in shallow alias, but it will not affect the river regime and the long-term fluvial process rule. The autumn flood in 2017 is slightly smaller than that in 2011, so it is expected that the deposition is slightly less in shallow sections. Nevertheless, deposits in some sections remain as navigation obstructions. With rapid scouring of deposition in shallow areas, the river configuration will return to its former status after the autumn flood.