人民长江Issue(11)：44-47,67,5.
长江口Sa分潮调和常数变化趋势研究
Study on change trend of harmonic constant of Sa tidal constituent at Yangtze River estuary
摘要
Abstract
On the basis of water level data of 5 tidal stations along the Yangtze River estuary, the tidal constituents, tidal type and distortion, as well as the temporal and spatial variation of mainly astronomical tides and Sa constituent in Yangtze River estu-ary were analyzed, and the reasons for the temporal and spatial variation of tidal constituents were also primarily discussed. The analytic results show that, the tide at Yangtze River estuary usually is irregular semi-diurnal tide with significant distortion. From the estuary to the upstream, the amplitude of astronomical tide decreases, the phase lag increases, on the contrary, the am-plitude of Sa constituent increases, and the phase lag decreases. The inter-annual variability of Sa constituent amplitude reveals the same changing trend with the maximum daily anomaly flow of Datong Station, and the Sa constituent at estuary area is signifi-cantly affected by runoff.关键词
潮汐特征/天文分潮/Sa分潮/长江河口Key words
tidal characteristics/astronomical tide/Sa constituent/Yangtze River estuary分类
建筑与水利引用本文复制引用
杨锋,谭亚,蒋体孝,白立影..长江口Sa分潮调和常数变化趋势研究[J].人民长江,2014,(11):44-47,67,5.基金项目
国家重点基础研究发展计划“973”计划“长江口海域水动力过程与生态系统演变机制”(2010CB429001) （2010CB429001）
