摘要
基于现场大量实测资料,研究分析鳌江河口海域水动力泥沙环境。结果表明,本区潮汐为正规半日潮型,平均潮差超过4 m,属强潮海区。沿岸及河口区以往复流为主;河口区及近岸涨落潮方向是SE-NW向,平均流速除了河口区超过0.5 m/s,其余海区均在0.3~0.5 m/s之间。鳌江属山溪性河流,多年实测平均流量仅为16.5 m^3/s。本区波浪以涌浪或涌浪为主的混合浪为主,常浪向和强浪向均为E向,最大波高为4.9 m。海域沉积物类型主要以粉砂质黏土和黏土质粉砂为主,属于典型的淤泥质海岸。近岸含沙量可达0.1~0.3 kg/m^3。鳌江河口悬沙中值粒径很细,约介于0.002 2~0.003 8 mm之间,为黏土物质组成。
Based on the field measured data,the paper analysises the hydrodynamic and sediment environment of the Aojiang river estuary.The results show that the tidal zone is regular semidiurnal tide whose mean tide range is more than 4 m,so it is a strong tide region.It is reversing current in the coastal and estuarine areas,whose direction is SE-NW.In the nearshore estuary,the average velocity is more than 0.5 m/s,besides it,the average velocity is between 0.3 ~ 0.5 m/s in the open sea area.Aojiang is a mountain river,the average annual flow is only 16.5 m^3/s.In this area,the main wave is the mixed wave of swell and swell,and the most direction of wave and strong wave is E,the maximum wave height is 4.9 m.The main types of marine sediments are silty clay and silty sand,which belongs to the typical muddy coast.The sediment concentration can reach 0.1 ~0.3 kg/m^3.The suspended sediment median grain size is very fine in the Aojiang river estuary,between from 0.002 2 to 0.003 8 mm,were composed of clay materials.
作者
范武雷
许婷
左书华
FAN Wu - lei;XU Ting;ZUO Shu - hua(Wenzhou Port Waterway Administration, Wenzhou 325000, Zhejiang, China;Tianjin Researeh Institute for Water Transport Engineering, M. O. T, Tianjin 300456, China)
出处
《水利科技与经济》
2017年第10期28-33,共6页
Water Conservancy Science and Technology and Economy
基金
浙江省交通运输厅科研计划项目(浙港航[2016]31号)
关键词
潮流
波浪
含沙量
底质
鳌江口
current
wave
sediment concentration
seabed material
Aojiang river estuary
