三峡工程蓄水前后长江河口段潮汐特征变化分析

Tidal Characteristics of Yangtze River Estuary before and after Impoundment of Three Gorges Reservoir

三峡工程蓄水后,长江流域的来水来沙特性发生了一定程度的变化,从而可能使长江河口段的潮汐特征发生变化。以分布于长江河口段6个潮位站的各6个代表年的实测潮位资料为基础,利用潮汐调和分析方法,对比分析长江河口段的潮汐特征。结果表明:三峡工程蓄水后,长江河口段的主要分潮的调和常数和潮汐特征参数发生了变化,但幅度比较小。

After impoundment of the Three Gorges Reservoir,the tidal characteristics of the Yangtze River Estuary could be changed.Based on the measured tidal level data of 6 representative years at the 6 tidal stations distributed in the Yangtze River Estuary,the tidal characteristics of the Yangtze River Estuary were compared and analyzed by using the tidal harmonic analysis method.The results show that,after impoundment of the Three Gorges Reservoir,the harmonic constants of the main tidal and tidal characteristic parameters in the Yangtze River Estuary changed,but the range of change is relatively small.