水流

Part 3 improves the former 2-D flow mathematic model and sets up a new one, which considers the situation of the barrel-drain existing in flood detention areas and the different hydraulic characteristics of flood between the barrel-drain field and out of the barrel-drain.

第二部分采用已有的蓄滞洪区二维水流数学模型模拟东西湖蓄滞洪区洪水演进过程，并对拟建的穿越该蓄滞洪区的高速公路工程和高压输电线路工程进行了防洪影响评价。

The main study object is Zhalong Wetland in Songnen Basin. The research of valley 3D visualization scene construction and flood routing simulation realization method are dealt, the solution of flood flow field simulation and cross section analysis are discuss emphatically.

本文以松嫩流域扎龙湿地为主要对象，对流域三维可视化虚拟场景构建和洪水演进实时动态模拟及其实现方法进行研究，着重探讨洪水流场模拟分析和断面分析问题的解决方法。

On the basis of previous study on deep channel, the South Branch,Xinqiao Channel,Nanxiaohong and Main Channel of Nangarg are chosen as the typical flood and ebb channels. Field data sampled in the flood season of 2001 and the dry season of 2003 are used as the base of the analysis of hydrodynamic characteristics, such as current, sediment, dominant current and dominant sediment.

在前人对河口冲刷槽研究的基础上，选择长江口南支、新桥水道、南小泓和南港主槽作为典型涨、落潮槽研究对象，以2001年洪季和2003年枯季实测资料为根据，比较分析了长江口涨落潮槽的水流、泥沙、优势流和优势沙等动力特征，结果表明用单一因子分析河槽性质不够全面。

The results are displayed vividly in virtual scene which is established with program language of Visual C++ and OpenGL. At present flow field simulation manner mostly has time delay, deficient controllability, so this paper brings forward the methods of drawing flow velocity vector graphics with OpenGL in the 3D virtual scene to simulate and analyze flow field. At the same time cross section and flood analysis are completed. Accordingly, it assists flood flow field visualization and provides the more effective analysis method for the flood mathematics model research and application.

针对目前流场模拟方式大多存在模拟时间滞后、缺乏可控性等问题，本文提出基于水力学模型计算得到的流速数据，在三维虚拟场景中利用OpenGL绘制洪水流速矢量图的方法进行流场动态模拟分析，在流速变化较大区域和需要重点观测区域，提取断面，分析断面和洪水淹没情况，从而解决洪水流场数值可视化的问题，为洪水数学模型的研究与应用提供更加直观有效的分析手段。

The floodgate is closed to control the flow of water.

为了控制水流，防洪闸门关闭了。

Gate in fact open to produce floodgate rivers belong to non- invariable to shed course.

其实闸门开启过程中的出闸水流属非恒定流。

This paper analyzes the mechanism of momentum transfer of the flows between main channel and floodplain.

探讨了复式断面渠道中主河槽和滩地之间水流的动量传递机理，应用动量定理导出了计算复式断面渠道中恒定均匀流的公式，并与实验资料吻合较好，从而证实了理论分析成果。

Flood is one of the natural phenomena of water flows and acting as a natural disturbance of rivers to their floodplain wetlands.

洪水是水流运动的一种自然现象，是河流对河滨洪泛湿地系统的一种正常的干扰。

This thesis numerically modeled the current hi the outfall reach of a new floodway, and provide the scientific basis for the layout and design.

本文主要针对淮河入海水道河口段，利用数学模型研究其水流状况，为工程规划和设计提供科学依据。

A gate used to control the flow of a body of water.

能够控制水流的一个水闸上的门。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。