Modelling of the Ebro River plume.: Validation with field observations
Modelling of the Ebro River plume.: Validation with field observations
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DOI：
10.3989/scimar.2003.67n4379
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发表时间：
2003-12-01
期刊：
影响因子：
1.4
通讯作者：
Ouillon, S
中科院分区：
文献类型：
--
作者：
Mestres, M;Sierra, JP;Ouillon, S
用两个数值代码模拟了由埃布罗河淡水排放到地中海西北部沿海水域引起的羽流扩散。沿海流场是通过基于浅水方程稳态版本的有限差分水动力模型获得的，而淡水弥散是通过求解三维对流扩散方程的拉格朗日代码计算的，并使用“随机游走”算法再现湍流扩散。数值结果、卫星观测和实地测量之间取得的一致，使人们能够分析更相关的物理机制，并对这两个模式进行相应的“调整”。结果表明，河口附近的局部水动力，以及河流羽流的扩散，高度依赖于驱动河流的流量和风场特征。
The spreading of the plume induced by the freshwater discharge from the Ebro River into northwestern Mediterranean coastal waters was modelled using two numerical codes. The coastal current field was obtained with a finite difference hydrodynamic model based on a steady-state version of the shallow-water equations, whereas the freshwater dispersion was calculated with a Lagrangian code that solves the 3D convection-diffusion equation and reproduces turbulent diffusion using a "random-walk" algorithm. The agreement obtained between numerical results, satellite observations and field measurements allows an analysis of the more relevant physical mechanisms and the corresponding "tuning" of the two models. The results show that local hydrodynamics near the river mouth, and consequently the spreading of the river plume, are highly dependent on the driving river discharge and wind field characteristics.