长江口南港近年河势变化分析及对策研究

Variation of river regime in south passage of the Yangtze estuary in recent years

通过对物理模型试验和现场观测数据的分析,研究南港近年河势变化的原因、趋势、不利影响以及应对措施。研究表明:1)由于大规模水利工程的建设,南港河势正在发生一种显著的适应性调整;2)在未采取其它工程措施的条件下,南港目前河势变化造成的不利影响将长期存在;3)在瑞丰沙上实施合适的人工工程,能遏制甚至扭转目前南港河势变化所带来的不利影响。

Based on the analysis of the data from physical model test and field observation, we study the reason, trend and detrimental effect of the change of river regime on the south channel recently and propose corresponding countermeasures. The results show that： 1） Due to the large-scale water conservancy engineering, an obvious adaptable adjustment of the river regime on the south channel is happening; 2） Without other engineering measures taken, the unfavorable influence due to the river regime＇s variation of the south channel will exist for a long time; 3） The unfavorable influence can be controlled if we implement appropriate artificial engineering on Ruifengsha.