长江下游潮汐河口段水位流量关系分析

Analysis on the stage-discharge relation in the tidal estuary of the lower reaches of the Yangtze River

长江下游潮汐河段受上游径流和下游潮汐共同影响,水位流量关系复杂,以长江河口徐六径水文站为例,分析徐六径站高低潮位和流量的关系,反应了潮位流量过程非单值对应特性,以及潮汐对水位流量关系的影响,通过对徐六径断面单值流量对应潮位分析,反应了流量对应水位频率分布的特征,为河道整治设计中确定水位流量对应关系提供参考。

The lower reaches tidal river of the Yangtze River was affected by upstream runoff and downstream tide, which had a complicated stage-discharge relation. Taking Xuliujing hydrological station in Yangtze estuary as an example, the relationship between high and low tide level and discharge was analyzed, which reflected the characteristics of non-single value of tidal flow and the influence of tide on the stage-discharge relation. According to the analysis of the tidal level of Xuliujing cross-section single value flow, the characteristics of the water level frequency distribution of the flow were reflected, which could provide a reference for the corresponding stage-discharge relation in river regulation design.