瓯江口航道淤积特征分析

摘要

根据实测水文泥沙和水深图资料,对瓯江口航道的淤积特征进行了分析.研究结果表明:工程海区潮汐属于正规半日潮类型,为强潮海区;工程海区潮流性质属于不规则半日浅海潮流,潮流运动呈往复流形式;航道水域范围多年来总体上处于0 m浅滩水域略有淤积、0 m下深槽略有冲刷,总体呈现略有冲淤变化的平衡状态;瓯江航道泥沙淤积主要发生在汛期洪水下泄和台风后,且以骤淤为主,其他时期冲淤变化甚微.%According to the observed hydrological data and the bathymetric charts, the siltation characteristics of navigation channel in the Oujiang estuary were analyzed in this paper.The results show that tide in the engineering sea area is normal semidiurnal tide with average tidal range over 4 m,and the tide is strong in this area.Tidal current in the engineering sea area belongs to shallow sea abnormal semidiurnal tide current and assumes to-and-fro current.The sea bed generally remains stable with little erosion and deposition.The siltation of the navigation channel in the Oujiang estuary mainly occurs during flood discharge and typhoon,that is,the sudden siltation, while there is little sedimentation during other times.