三亚河入海口与感潮河段悬浮物分布特征及潮汐之影响

<正>河流入海口及感潮河段是陆海相互作用藕合带1],受径流和潮汐的共同作用,具有独特的海洋环境。三亚河位于三亚湾的东侧,是注入三亚湾的最大河流,其流程28.8 km,集雨面积337.02 km2,河床平均坡降6.09‰,总落差459.21 m,三亚河属潮汐河流,平均每日纳潮量达490万立方米,年径流量为179亿立方米,现实际日纳潮量为253立方米、年径流量为92亿立方米。近年来,国内学者已对三亚湾海域开展了若干研究,如中国科学院南海海洋研究所何雪琴2]、南京大学海岸与海岛开发教育部重点实验室毛龙江等3]都先后报道过三亚湾的研究结果,但对三亚河口及感潮段悬浮物分布的研究目前尚未见报道。本文通过分析监测结果,研究了三亚河入海口及感潮河段悬浮物分布特征和潮汐对其影响。

Suspension Distributing Characteristics of Sanya River Estuary and Tide-induced Effects

Sanya River is one of the biggest affluxes into Sanya Bay.It is of importance to analyze the suspensions in estuary of Sanya River for the studies on sand-mudded,costal erosions,marine technology,etc.On April 20 and 21 2007,26-hour consecutive observations to Sanya River estuary were performed to analyze the relationships between suspensions and tide as well as ocean current.The results showed that the suspension concentration was higher in estuary than that in the open ocean and higher at the bottom than that on the surface,and the characteristics of the relationship between suspensions and tide were related to the positions of monitoring stations.The suspensions were negatively correlated to the tide height,particularly at the estuary with narrow river-way and increased current;whereas no significant difference was detected between suspensions and tide at the station located in the pelagic waters.