Development of integrated Tokyo Bay model combined with Distributed Hydrological Model (DHM)

该项目包括两个小项目。(1)基于大涡模拟的改进流动模型的开发。(2)分布式水文模型在鹤见川的应用。每个项目都取得了以下成果。(1)非静力三维大涡模拟模式本项目建立了一个非静力三维大涡模拟模式（MEL 3D）。该模型的主要特点是CIP方法，ALE方法，SOR方法，和二阶封闭格式（SOC）。通过与矩形明渠水池内波浪运动的室内实验结果进行对比，验证了本文的理论分析。实验结果与数值模拟结果吻合较好，如用激光多普勒流速仪获得的流场。将验证后的MEL 3D应用于东京湾流场的模拟。海面上的边界条件由AMeDAS的插值风场给出。实时模拟器 ...更多信息 该系统还采用html语言开发，可以通过web页面访问查看流场的实时情况。临时网页地址是http://210.251.65.4/unity/。由于该地址在不久的将来将无法使用，请访问网页http：//www.nilim.go.jp/，并找到该页面以查看实时模拟结果。该模型将在下一个项目中进行改进，以包括溶解氧需求分布的再现，这可能会导致东京湾头部周围的“Aoshio”。(2)分布式水文模型收集鹤见河流域的GIS数据集，作为分布式水文模型（DHM）的输入。虽然DHM是一个基于物理的水文模型，不包括无意义的系数，一些系数必须通过校准评估，因为很难获得所有的空间分布系数鹤见河流域。成功地进行了标定，并将标定结果与水池模型的标定结果进行了比较。不幸的是，从比较中发现，DHM必须进一步改进才能获得更好的结果。少

Two minor projects are included in this project. (1) Development of a highly improved flow model based on LES model. (2) Application of a distributed hydrological model into Tsurumi River. Each project has achieved the following results.(1) Non-hydrostatic three-dimensional LES modelA non-hydrostatic three-dimensional LES model (MEL3D) was developed in this project. The main features of this model are the CIP method, the ALE method, the SOR method, and Second-Order Closure Scheme (SOC). The validation was done by making a comparison with laboratory experiment results in terms of internal wave motion in a rectangular open channel tank. The results from laboratory experiment were agreed very well with numerical simulation results, such as flow field obtained using laser Doppler current meter. The verified MEL3D was applied to reproduce flow field in Tokyo Bay. The boundary condition on the sea-surface was given by using interpolated wind field obtained from AMeDAS. Real-time simulator wa … More s also developed by using html, which can enable us to access to see the real-time flow field through web page. The temporal web page address is http://210.251.65.4/unity/. Because this address will not be available in the near future, please access to the web page, http://www.nilim.go.jp/, and find the page to see the real-time simulation result. This model will be improved in the next project in order to include the reproduction of the distribution of dissolved oxygen demand, which may cause 'Aoshio' around the head of Tokyo Bay.(2) Distributed hydrological modelGIS data set in Tsurumi River Basin was collected to use as an input for a distributed hydrological model(DHM). Although DHM is a physically based hydrological model and does not include meaningless coefficients, some coefficients had to be evaluated by calibration because of the difficulty obtaining all the spatially distributed coefficients in Tsurumi River Basin. The calibration was successfully done, and the results were compared with those from a tank model. Unfortunately, it was found from the comparison that DHM has to be improved more to obtain better results. Less