岛群峡道港口工程开发动力地貌响应研究——以虾峙渔港工程为例

Morphodynamic behavior of strait channels in response to port engineering around island group:a case study of Xiazhi fishing port

峡道独特的地形和位置使得峡道内或峡道间存在水动力和泥沙运动、沉积作用、地形冲淤等相互作用。以虾峙岛渔港工程为例,结合现场水文测验和实测地形资料,分析海域动力泥沙环境和渔港工程实施后的海床泥沙沉积过程;并通过潮流数学模型研究渔港防波堤工程实施前后的水流变化,从动力机制上解释了海床冲淤变化的原因。从动力地貌学角度提出增加口门宽度,恢复涨落潮动力的整治思路,并通过泥沙数学模型预测了相应方案实施后的效果。研究可为类似岛群峡道港口工程开发提供借鉴。

The unique topography and location of the strait channels makes the interaction of hydrodynamic and sediment transport,sedimentation,topographic erosion and deposition in or between the channels.Taking the Xiazhi fishing port project as an example,based on the field hydrological survey and the measured topographic data,the dynamic sediment environment and the evolution of seabed erosion and deposition after the implementation of fishing port project are analyzed.The influence to current of the breakwater project of the fishing port is studied through the mathematical model,and the reasons for the changes of seabed erosion and deposition are explained from the dynamic mechanism.From the perspective of dynamic geomorphology,the regulation idea of increasing the width of the gate and restoring the hydrodynamic intensity is put forward.The research can provide a reference for the development of port engineering in similar sea areas.