近30 a来东江三角洲潮汐变化规律浅析  

Analysis of Tidal Variation in Dongjiang River Delta in Recent 30 Years

作　　者：张胜强 ZHANG Shengqiang(Hydrological Bureau of Huizhou, Guangdong Province, Huizhou 516000, China)

机构地区：[1]广东省水文局惠州水文分局,广东惠州516000

出　　处：《广东水利水电》2022年第3期45-50,共6页Guangdong Water Resources and Hydropower

摘　　要：根据1991年以来东江三角洲区域内樊屋、石龙(二)、大盛和泗盛围4站近30 a实测潮位资料及东江干流博罗(二)站近10 a极值流量数据,通过计算分析各站在相应年份高高潮、高低潮、平均高低潮和涨落潮潮差、历时等潮汐特征值的变化规律以及樊屋、石龙(二)、大盛、泗盛围4站潮汐变化与上游博罗(二)站极值流量的对应关系。结果表明:①自上游到下游各站高高潮、高低潮和平均低潮呈逐步下降趋势,落潮历时均明显大于涨潮历时;②在同一时段,涨落潮潮差在入海口较大,越往上游越小,而高高潮与高低潮之差则正好相反;③东江北干流石龙(二)站潮汐强度强于干流樊屋站,近些年来石龙(二)站平均高潮位较樊屋站略高。Based on the measured tidal data of Fanwu,Shilonger,Dasheng and Sishengwei stations in Dongjiang River delta in recent 30 years since 1991,and the extreme discharge data of Boluoer hydrological station on the main stream of Dongjiang River in recent 10 years,the variation rules of tidal characteristic values such as maximum,minimum and mean values of high and low tides,tidal range and duration at each station in corresponding years are calculated and analyzed,and the correspondence between the tidal variation of Fanwu,Shilonger,Dasheng and Sisengwei stations and the extreme discharge of Boluoer in the upper stream is analyzed.The results show that:①From the upstream to the downstream,the high and low tides gradually decrease,and the ebb tide duration is significantly longer than the flood tide duration;②In the same period of time,the tidal range of the ebb and flow tide is larger in the estuary,and the farther upstream,the smaller the difference between the high tide and the low tide is just opposite;③The tidal intensity of Shilonger station is stronger than Fanwu station,and the average high tide of Shilonger station is slightly higher than Fanwu station in recent years.

关 键 词：东江三角洲 潮汐 潮汐变化 潮汐特征值 

分 类 号：P731.23[天文地球—海洋科学]