Wind-Wave-Current Coupled Model for Coastal Current System in the Wave-Shoaling Region

浪滩区沿岸流系统风波流耦合模型

基本信息

批准号：
14350266
负责人：
YAMASHITA Takao
金额：
$ 9.15万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350266/
关键词：
coastal current system ocean wave model ocean model meso-scale meteorological model air-sea interaction observation pier air turbulence wind-induced current 波浪浅水変形大気・海面相互作用海岸波浪海上風冬季季節風

项目摘要

Objectives : This research project aims to make clear the processes of momentum exchange between atmosphere and ocean and to establish a numerical model for describing air-sea interaction in the coastal ocean. The momentum flux from an air turbulent flow to ocean through a wave in the wave shoaling region is modeled. Using observed knowledge, numerical model for describing an interaction system of air-wave-coastal current was constructed.Main Results : The result s obtained by this research are as follows.(1)Observational researches :The generating mechanism and structure of a coastal current system were clarified by a wave and current observation in the wave shoaling region at the Ogata Wave Observatory, Disaster Prevention Research Institute, Kyoto University.(2)Coastal Current System :The mathematical model of the coastal current system which consists of fields of wind, wave, turbulent flow, and mean coastal current was built. It clarified that a coastal current system was major external force of material transportation in winter Monsoon in the coasts along Japan Sea.(3)Air-Wave-Current Coupled Model:Wave breaking shear stress was proposed as a white-cap dissipation in which wave energy is changed into a flow. Thereby, the Air-Wave-Current Coupled Model was established and the simulation of storm surges and high waves was carried out. Huge wave simulation in Japan Sea was conducted by Air-Wave coupled model, surge-wave interaction in Yatsushiro Sea and the Bay of Bengal were also conducted by Air-Wave-Current Coupled Model.(4)Atmosphere-Land Surface-Ocean Coupled Model:Synthesizing the model in (3) and the models of rainfall, runoff, and land surface, the integrated model for simulation of water cycle and a material transportation was established. Observation data in Tanabe Bay was employed for verification of the model

目标：该研究项目旨在清楚大气与海洋之间的动量交流过程，并建立一个数字模型来描述沿海海洋中的空气相互作用。从波浪鞋带区域中的波流到海洋的动量通量进行了建模。使用观察到的知识，构建了用于描述空波沿海电流相互作用系统的数值模型。沿海电流系统的数学模型由风，波浪，湍流和平均沿海电流组成。它澄清说，沿海电流系统是日本海沿海冬季季风的主要外部力量。（3）提出了气波 - 电流耦合模型：提出波浪破裂的剪切应力，作为白帽耗散，其中波浪能将波动变为流动。因此，建立了气波耦合模型，并对风暴潮和高波进行了模拟。日本海上的巨大波浪模拟是通过空波耦合模型，Yatsushiro Sea和孟加拉湾的浪潮波相互作用进行的。（4）大气层地面 - 地面 - 东方耦合模型：在（3）中合成降雨，跑步模型的材料，陆地和集成的模型，并建立了一定的材料，并建立了一定的模型，并建立了降雨模型。使用Tanabe Bay的观察数据进行验证