2001~2017年长江口南北港水文要素变化分析  

Study of hydrological characteristics in south and north channels of the Yangtze River Estuary from 2001~2017

作　　者：刘传杰 李保 李昌生 邵宇阳[2] 唐诗月 LIU Chuanjie;LI Bao;LI Changsheng;SHAO Yuyang;TANG Shiyue(The Survey Bureau of the Hydrology and Water Resources of the Yangtze Estuary,Shanghai 200136,China;College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]长江水利委员会水文局长江口水文水资源勘测局,上海200136 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《水利水电快报》2022年第4期27-30,37,共5页Express Water Resources & Hydropower Information

基　　金：国家重点研发计划(50709007);上海市水务局科研项目(沪水科2020-02)。

摘　　要：为了探究长江口南北港水文要素变化情况,基于长江口区域2001~2017年实测水文资料,对南港和北港的含沙量、分流比及分沙比的年际变化进行了分析,结果表明:①南港洪季涨、落潮含沙量呈下降趋势,洪季落潮含沙量下降趋势较枯季更明显;②北港洪季涨、落潮平均含沙量呈减小趋势,枯季涨潮含沙量呈增加趋势,而落潮含沙量略有减小趋势;③南港落潮分流比基本处于稳定状态,落潮分沙比有减小趋势;④南港涨潮分流比大于落潮分流比,涨潮分流比在55.0%上下波动,涨潮分沙比大于分流比。研究成果可为该水域的综合开发及管理提供科学依据。In order to explore the changes of hydrological factors in the north channel and south channel of the Yangtze River Estuary,based on hydrological data of the Yangtze River Estuary from 2001~2017,the interannual variation of suspended sediment concentrations,flow and sediment diversion ratios in the north channel and south channel were analyzed.The analysis results indicated that:①The suspended sediment concentrations of the ebb and flood tides in the south channel showed a certain downward trend and the downward trend of sediment concen⁃tration of the flow tides was more obvious in the flood seasons than in the dry seasons.②In the north channel,the average sediment concentration of the ebb and flood tides tended to decrease in the flood seasons and the flood tide average sediment concentration had an increasing trend in the dry seasons,while it decreased slightly during the ebb tide.③In the South Channel,flow diversion ratios of ebb tide were basically in a stable state,and the sedi⁃ment diversion ratio had a decreasing trend.④The flow diversion ratios of flood tide were larger than that of the ebb tide in the South Channel.The flow diversion ratios of flood tide fluctuated around 55%,and sediment diversion ra⁃tios of the flood tide were greater than the flow diversion ratio.The researches could provide a scientific basis for the comprehensive development and management of Yangtze River Estuary.

关 键 词：含沙量 分流比 分沙比 南港 北港 长江口 

分 类 号：P333.4[天文地球—水文科学]