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Researches on breaking-induced currents by waves are summarized firstly in this paper. Then, a combined numerical model in orthogonal curvilinear coordinates is presented to simulate wave-induced current in areas with curved boundary or irregular coastline. The proposed wave-induced current model includes a nearshore current module established through orthogonal curvilinear transformation form of shallow water equations and a wave module based on the curvilinear parabolic approximation wave equation. The wave module actually serves as the driving force to provide the current module with required radiation stresses. The Crank-Nicolson finite difference scheme and the alternating directions implicit method are used to solve the wave and current module, respectively. The established surf zone currents model is validated by two numerical experiments about longshore currents and rip currents in basins with rip channel and breakwater. The numerical results are compared with the measured data and published numerical results. 相似文献
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The mild-slope equation is familiar to coastal engineers as it can effectively describe wave propagation in nearshore regions. However,its computational method in Cartesian coordinates often renders the model inaccurate in areas with irregular shorelines,such as estuaries and harbors. Based on the hyperbolic mild-slope equation in Cartesian coordinates,the numerical model in orthogonal curvilinear coordinates is developed. The transformed model is discretized by the finite difference method and solved by th... 相似文献
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基于无结构网格的MIKE 3D模型,建立了长兴岛海域三维潮流水质数学模型.按照海洋功能区划的水质要求,综合分析离岸排放的特点,计算马家咀排污口的混合区面积及污染物浓度响应系数,进而对马家咀排污口近期和远期环境容量进行计算.结果表明,根据2012年海水水质现状,马家咀排污口近、远期混合区面积最大为0.046 5 km~2,各主要污染因子化学需氧量(COD)、无机氮(DIN)、活性磷酸盐(PO_4~(3-)-P)和石油类的剩余环境容量分别为812.0、143.7、25.6、59.7 t/a. 相似文献
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大量的抗旱打井找水开发深层岩溶地下水资源实例证明,黔南岩溶石山区不同岩溶形态富水电测深法异常类型及成因有一定规律可循,单支电测深曲线异常类型可划分为缓升型、缓降型、低阻平台型、低阻V型、低阻平升型.低阻降尾型,富水地段电测深视电阻率断面等值线异常类型可划分为低阻U型、低阻O型、低阻梯度带型、低阻台阶型. 相似文献
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