Characteristics of Wave and Current Field around a Longitudinal Reef System

纵向礁体系统周围的波场和流场特征

• 批准号: 07405024
• 负责人: GODA Yoshimi
• 金额: $ 13.89万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07405024/
• 关键词: Breakwater; Artificial Reef; Wave Energy Control; Water Exchange; 砕波

The objective of this research is to clarify the characteristics of wave and current field around a newly developed "Longitudinal Reef System". A system of longitudinal reefs was tested in a wave basin for wave heights and currents distribution. A numerical model based on the parabolic equation was also examined by the experimental results.1) A system of three units of longitudinal reefs was placed in a wave basin. Wave heights and currents were measured for obliquely incident regular and irregular waves. It was confirmed that the wave energy was efficiently dissipated by the system and water exchange with offshore region was improved.2) A numerical model with the radiation stress computed by the parabolic equation yielded wave-induced currents which were in good agreement with experimental results.3) A statistical approach was adopted for the numerical calculation for the case of irregular waves. The model gave a good agreement with the experimental results.4) Current field induced by a system of seven units was numerically investigated. Large decay of the wave energy by the system showed the effective function for coastal protection of the system.

本研究旨在探讨一新发展之“纵礁系统”之波流场特性。在波浪水池中对纵向礁系统进行了波高和水流分布试验。本文还对基于抛物方程的数值模型进行了试验验证。1）在波浪水池中放置了三个纵向礁体。波高和电流测量斜入射的规则波和不规则波。结果表明，该系统有效地耗散了波浪能量，改善了与近岸海域的水交换; 2）采用抛物方程计算辐射应力的数值模型，计算得到的波生流与实验结果吻合较好; 3）采用统计方法对不规则波情况进行数值计算。该模型与实验结果吻合较好。4）数值研究了七个单元系统诱导的电流场。系统对波浪能量的衰减较大，表明了系统对海岸防护的有效作用。

项目成果

Goda, Y., R.Yoshizaki and T.Harada: "Distribution of wave heights and wave-induced currents around a longitudinal reef system" Proc.of Coastal Eng., JSCE. Vol.43-1. 121-125 (1996)

Goda, Y.、R.Yoshizaki 和 T.Harada：“纵向珊瑚礁系统周围波高和波感流的分布”Proc.of Coastal Eng.，JSCE。