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首页> 外文会议>Seventh International Conference on Modelling, Measuring and Prediction of Water Pollution null Cadiz >A 3D simulation of the lower trophic ecosystem in the Ise-Mikawa Bay estuary using a coupled physical and biological model
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A 3D simulation of the lower trophic ecosystem in the Ise-Mikawa Bay estuary using a coupled physical and biological model

机译：使用耦合的物理和生物模型对伊势三河湾河口下部营养生态系统进行3D模拟

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摘要

The long-term variation in flow velocity, temperature and salinity fields in the Ise-Mikawa Bay estuary was examined in a triennial simulation, using a time-dependent 3-D hydrodynamic model. The simulation covered from April 1993 to March 1996. The daily change regimes of the observed sea-surface winds, tidal elevation at the open boundary, river discharges and meteorological parameters were incorporated into the forcing variables of the modelled estuary. Simulated distributions of temperature and salinity were compared favorably with the field measurements both in time and space, suggesting good reproducibility of the flow field by the hydrodynamic model. The numerical results were compared favorably with the field measurements of water quality indicating the validity and predictive capability of the model, and thus served for a detailed analysis of nutrient and oxygen cycles in the estuary. It turned out from the nutrient flux analysis that primary productivity varied considerably over the three years in relation to water temperature and that the most limiting nutrient to phytoplankton growth was nitrogen. The oxygen field in the bottom layer, on the contrary, did not show any clear year-to-year variation in that the oxygen-depleted water mass regularly appeared in the middle-upper basin from late June, developed to cover the whole middle-upper basin in midsummer, and dissipated by about mid-November.
机译：在三年一度的模拟中，使用时间相关的3-D流体动力学模型检查了伊势三河湾河口流速，温度和盐度场的长期变化。模拟涵盖了从1993年4月到1996年3月。观测海面风，开放边界的潮汐高程，河流流量和气象参数的日变化方式已纳入到模拟河口的强迫变量中。在时间和空间上，模拟的温度和盐度分布与现场测量结果相吻合，表明流体动力学模型具有良好的流场重现性。将数值结果与表明模型的有效性和预测能力的水质现场测量结果进行了比较，从而有助于对河口中养分和氧气循环的详细分析。从养分通量分析中可以看出，在过去的三年中，主要生产力相对于水温的变化很大，而对浮游植物生长影响最大的养分是氮。相反，底层的氧气场没有显示出明显的逐年变化，因为从6月下旬开始定期在中上盆地出现缺氧水团，并逐渐覆盖了整个中层。于盛夏上流域，并于11月中旬消散。

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