Development of Computer-Aided System for Environmental Management in Estuaries

可视化技术对于理解物理过程或对新计划项目的环境评估至关重要。究其原因，无论是作为晋升官的政府官员，还是作为评价官的公民，一般都没有关于河口和沿海海域水动力学的专业知识。因此，采用了水力模型实验，因为仅通过观察排出的染料的扩散就可以很容易地了解对流和分散过程的变化。大多数相关人员可以在没有专家知识的情况下理解新项目对河口系统的影响。然而，随着对复杂现象的理解越来越清晰，例如由于密度差引起的分层，内波和科里奥利力对流动和分散系统的影响，数值实验被认为是合适的模拟器之一。在这种情况下，更有必要开发可视化技术，以便没有专业知识的公民可以轻松评估计划项目或替代项目的价值。三维斜压流模型和拉格朗日示踪轨迹的动画可视化系统由k.n akatsuji开发。采用通用坐标的网格生成变换系统是由s.a aya开发的。它使流的计算即使在复杂的拓扑中也是可行的。生成流型的软件，如时间轨迹，流线，条纹线，包括湍流量是由福岛开发的。图像处理系统由I.Fujita公司开发，可以将航空照片和卫星图像中的表面气泡、灰尘或漂浮颗粒转换为表面速度模式。将该系统应用于Yodo河的洪水流量中，取得了地面流速模式的成功。开发了用于非定常明渠水流水力实验的可视化技术和自动数据分析系统。卫星图像分析系统由M.Mizutori公司开发。它应用于福岛外海的流动和分散，并与ARGOS buy一起用于澄清中尺度海洋流动。少

Visualization techniques are of fundamental importance to understand the physical processes or environmental assessment against newly planned projects. The reason is that both government officers on the side of promotion and citizens concerned on the side of evaluation, generally, have no expert knowledge of hydrodynamics in estuaries and coastal seas. Hydraulic model experiments, therefore, have been used, because the change of convection and dispersion processes can be easily understood by only watching the spreading of discharged dyes. Most of people concerned can understand the effects of new projects on the estuarine system without the expert knowledge in that way.However, as the understanding of complex phenomena become clear, for example, the importance of stratification due to density difference, internal waves, and Coriolis force affect the flow and dispersion system, the numerical experiments are recognized as one of suitable simulators. Under such circumstances, it is necess … More ary to develop the visualization techniques such that citizens without expert knowledge can easily evaluate the values of planned projects or their alternative ones.1. Three-dimensional baroclinic flow model and Lagrangian tracer trajectories with animation visualization system are developed by K.Nakatsuji.2. Grid-generation transformation system using the general coordinate is developed by S.Aya. It makes the computation of flows even in complex topologies enable.3. Software producing the flow pattern such as time-trajectories, stream line, streak line including turbulence quantities is developed by Y.Fukushima.4. Image processing system is developed by I.Fujita, which enables to transform the surface velocity pattern from bubbles, dusts or floating particles at surface in aerial photographs and satellite images. This system applied to the flood flow of Yodo River to succeed in the surface velocity pattern.5. Visualization technique and automatic data analysis system for hydraulic experiments of unsteady open channel flow are developed.6. Satellite image analysis system is developed by M.Mizutori. It applied to the flow and dispersion in Off-Fukushima Seas together with ARGOS buys for clarifying meso-scale oceanic flows. Less