曲线坐标下近岸波浪破碎区污染物输运数值模型研究  

Study on numerical models for pollutants transport in surf zones in curvilinear coordinates

作　　者：崔雷[1,2] 姜恒志[1,2] 石峰[2] 肖玉仲[1] 于大涛[1] 刘志华[1] 

机构地区：[1]国家海洋环境监测中心国家海洋局近岸海域生态环境重点实验室,辽宁大连116023 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116023

出　　处：《水力发电学报》2014年第4期139-148,共10页Journal of Hydroelectric Engineering

基　　金：国家重点基础研究发展计划项目(2013CB430403);国家自然科学基金(51279023);国家海洋局近岸海域生态环境重点实验室基金(201309)

摘　　要：由于近岸斜向入射波浪演变、破碎等效应而形成的近岸波流场是近岸海域重要的环境水动力因素,对近海污染物的输运起着显著的影响。本文建立了曲线坐标系下相耦合的基于抛物型缓坡方程的波浪传播数值模型、近岸流数值模型及近岸波流场中的污染物输运数值模型,以近岸波流场为动力基础对不规则岸线地形下近岸污染物的输移扩散进行了数值模拟研究。应用上述联合数值模型对近岸沿岸流作用下的污染物输移扩散进行了数值模拟验证分析,数值模拟效果良好。进而将数值模型应用于Gourlay物理模型实验,对该地形近岸流作用下的污染物输运进行了数值模拟分析,污染物分布数值结果与作为其动力基础的近岸波流场表现出良好的一致性。Offshore currents induced by breaking of obliquely incident waves in coastal zones are important environmental dynamic factors, which significantly affect transport and distribution of pollutants in these zones. A combined numerical model in orthogonal curvilinear coordinates is developed to simulate pollutants transport in breaking waves-induced offshore currents in surf zones with curved boundary or irregular coastlines, including a wave transformation model based on the parabolic mild slope equation, a wave-induced offshore current model, and a pollutant transport model. This combined model has been applied to pollutants transport in longshore currents, and comparison of the simulations with experimental measurements shows good agreement. The model has also been applied to simulation of the Gourlay experiment and it shows consistent results with the distribution of waves and offshore currents.

关 键 词：环境水力学 污染物输运 数值模拟 曲线坐标系 抛物型缓坡方程 近岸流 

分 类 号：P731.24[天文地球—海洋科学]