Development of Computer-Aided System for Environmental Management in Estuaries

可视化技术对于理解物理过程或针对新规划项目的环境评估至关重要。这是因为无论是晋升的政府官员还是评估的公民，一般都没有河口和沿海海洋流体动力学的专业知识。因此，采用水力模型实验，因为对流和分散过程的变化可以通过观察排出的染料的扩散来容易地理解。大多数相关人员在没有专业知识的情况下也能理解新工程对河口系统的影响，但随着人们对复杂现象的认识逐渐清晰，例如密度差引起的层化、内波、科里奥利力等对水流和扩散系统的影响，数值试验被认为是合适的模拟手段之一。在这种情况下， 关于我们 开发可视化技术，使没有专业知识的公民可以很容易地评估计划项目或其替代项目的价值。三维斜压气流模型和拉格朗日轨迹动画可视化系统由K.Nakatsuji开发。使用通用坐标的网格生成转换系统由S.Aya开发。它使得即使在复杂的拓扑结构中的流的计算成为可能。由Y.Jubushima开发了生成包括湍流量的时间轨迹、流线、条纹线等流型的软件。图像处理系统是由I.Fujita开发的，它可以从航空照片和卫星图像中的气泡，灰尘或漂浮颗粒中转换表面速度模式。将该系统应用于淀川洪水流场，成功实现了水面流速模式.开发了明渠非恒定流水力学试验的可视化技术和数据自动分析系统. M.Mizutori开发的卫星图像分析系统。它与ARGOS一起应用于福岛外海的流动和扩散，以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