射阳港拦门沙航道整治工程建设前后水沙特征分析

为研究工程区海域水沙特征的时空分布、运动规律,采用不同时期的现场水文泥沙资料,对射阳港拦门沙航道工程建设前后的水流、含沙量、悬沙粒径和底质特征进行了对比分析。研究表明:射阳港一期航道工程建设后航道内潮波发生变形,涨潮流速大、历时短;落潮流速小、历时长,进入到航道内泥沙很难被带出航道,容易导致航道淤积。工程区海域整体含沙量较大,一期工程建设后导堤内涨潮含沙量明显增大,口门净输沙向口内,通过口门进入到航道的高含沙水体是航道淤积的重要沙源之一。导堤间边滩表层存在部分淤泥,且具有一定流动性,在水流及自身重力作用下,边滩淤泥可归入航道内。

Study on the characteristics of hydrodynamics and sediment in the mouth bar area of Sheyang estuary

To study the space time distribution and the law of sediment motion, based on the field hydrological and sediment data during different periods, the hydrodynamics, suspended sediment concentration and grain size, and the median size of seabed sediment were analyzed to investigate the effect of the construction of the channel regulation projects at the Sheyang Port. The research results show that tidal wave deformation would occurr under the effect of the phase I channel project. The flood velocity is significantly greater than the ebb with a shorter duration time. As in a flood-dominant system, the sediment is hard to be taken out and gradually apt to deposit in the channel. The high sediment concentrations from the entrance and the silt on the shoal between the two dykes are the primary cause of the channel siltation.