Integration of Distributed Hydrological Model which includes the model of POM and Ecological Model in Tokyo Bay

首先，利用分布式水文模型研究了网格尺寸效应。基于网格的分布式水文模型能够利用气象模型、雷达和卫星遥感等数据，以较高的时空分辨率模拟河流和地表洪水，是流域洪水风险分析的有效工具。选择一个合适的网格大小是至关重要的任何应用程序的一个基于网格的模型，这需要正确的理解网格大小对模拟结果的影响。采用基于过程的分布式水文模型，对两个典型流域的洪峰流量和水面淹没进行了模拟，分析了网格分辨率对模拟结果的影响，并对河流模型和河口模型集成的效果进行了评价，以验证集成河口模型的效益。一个被整合者 ...更多信息 河口模型包括水文模型、河口模型和气象模型。一般来说，盐度分布可能被发现是显着的长期尺度的水质评价在一个封闭的海湾，因为盐度主要控制密度在一个海湾。因此，研究潮汐对海湾盐度的影响，以论证建立河口综合模型的必要性。采用两种不同流量、三种不同潮幅的潮汐效应，研究了潮汐效应对河口盐度通量的影响。结果表明，当模型上游流量为常数且考虑潮汐流量时，随着平均盐度从初始值的减小，上游流量小于潮汐流量。因此，将河口模型与河流模型有机结合，能够较好地反映河口的特点，对河口盐度通量的准确计算具有重要意义。少

Firstly, the grid size effect was investigated using Distributed Hydrological Model. In general, grid-based distributed hydrological models are considered to be a very effective flood modeling tool for basin-wide flood risk analysis due to their capabilities of simulating river and surface inundations at high spatio-temporal resolutions by taking advantages of grid-based data from meteorological models, radar and satellite remote sensing. Selecting an appropriate grid size is critically important for any application of a grid-based model, which requires proper understanding of effects of grid sizes on simulated outcomes. The paper presents the outcomes of a study conducted to analyze the effects of grid resolution in simulated river peak flows and surface inundation in two selected river basins using a process-based distributed hydrological model.The effect of integration of river model and estuary model was evaluated to demonstrate the benefit of an integrated estuary model. An integr … More ated estuary model consists of hydrological model, estuary model and meteorological model. In general, salinity distribution may be found to be significant for the evaluation of long time scale water quality in an enclosed bay because salinity mainly controls density in a bay. Therefore, the influence of tide on salinity in a bay was investigated to demonstrate the necessity of an integrated estuary model. Two different river discharges and three different tidal amplitudes were used to examine the influence of tidal effect on salinity flux at the mouth of river. It was revealed that, for the case where river discharge at the upstream end of river model is constant and river discharge due to tide is included, with increasing reduction of average salinity from initial conditions, the river discharge at the upstream end was smaller than river discharge due to tide. The integration of river model, which can include the feature of estuary, and estuary model is, thus, found to be important to evaluate salinity flux at the mouth of river accurately. Less