Numerical simulation on coastal environment in Kamaishi Bay (Japan) by MEC Model
Numerical simulation on coastal environment in Kamaishi Bay (Japan) by MEC Model
复制标题
MEC模型对日本釜石湾海岸环境的数值模拟
DOI：
10.1109/oceans-taipei.2014.6964396
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Daisuke Kitazawa
中科院分区：
文献类型：
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作者：
Md. Nazrul Islam;Daisuke Kitazawa
采用 3D 海洋环境委员会 (MEC) 模型来描述大东日本宫城县釜石湾受气候变化强迫驱动的水质和生态系统水动力的具体循环模式。本研究的主要关注点是2011年地震和海啸灾害造成的污染物扩散对海洋生态系统的影响。在本研究中，我们模拟了2009年1月至2012年12月的水质和生态系统结构的变化。利用MEC模型预测了釜石湾不同层位的各种关键水质指标和潮汐流量的分布。模拟得出的潮汐特征与测量得出的潮汐特征之间具有高度相关性。我们还模拟了破水效应对潮汐、洋流以及水产养殖和渔业一体化的影响。使用平均季节性风力（东北风、东南风和西南风）的风力驱动流在凯米奇湾上空形成不同的环流。同样，釜石湾水域的温度和盐度分布也具有强烈的季节性变化。水质受到污染物的严重影响，并且由于家庭和工业废物排放量的增加以及海湾人为污染的增加而不断恶化。结果发现，实测和模拟的放射性物质污染均符合日本环境标准。观测和模拟的DO、T-N、T-P浓度与灾前相差不大。
A 3-D Marine Environmental Committee (MEC) model was conducted to describe the specific circulation patterns of hydrodynamics of water quality and ecosystems driven by climate change forcing in Kamaishi Bay at Miyagi Prefecture in the Great East Japan. The major concern of this study is the diffusion of pollutants caused by 2011 Earthquake and Tsunami disaster impacts on marine ecosystem. In this study, we simulate the changes of water quality and ecosystems structure from January 2009 to December 2012. The MEC model has been used to predict the distributions of various key water quality indicators and tide flow in the different layer of Kamaishi Bay. High correlation is obtained between simulation derived and measurement derived tidal characteristics. We also simulated the effects of breaking water effects on the tide, currents and integrating aquaculture and fisheries. The wind driven flow using mean seasonal wind forcing (NE, SE, and SW) creates different circulations over Kiamichi Bay. Similarly, the temperature and salinity distribution of Kamaishi Bay waters is characterized by strong seasonal variations. The water quality is intensely affected by pollutants and has continually deteriorated due to increased discharges of domestic and industrial waste as well as an increased loading in anthropogenic contamination into the Bay. The results were found that measured and simulated contaminations of radioactive materials were under the environmental standards in Japan. Observed and simulated DO, T-N and T-P concentrations were not so large different from those before the disaster.