河道

The theory and application is explained in this paper. Software XMGREDIT5 matching ELCIRC is used to generate unstructured grid, and is considered fit for ocean but rivers. Tidal current is simulated and validated well, and sensitivity of current structure to bathymetry is visible. Affection of wind is qualitatively analyzed here. At the same time the model is improved on as required, like the tidal open boundary which could choose not only long period harmonic constant but also short period harmonic constant and tidal level, and multi-point results and flow field data could be exported effectively with binary results.

本文介绍了ELCIRC的理论及使用；基于其在Linux平台下的软件XMGREDIT5生成全三角形网格并评价其特性，认为XMGREDIT5较适合大范围海域而不适用于河道；应用ELCIRC模型计算了长江口的潮流场并进行验证，结果与实测资料吻合良好，且能较好地模拟出地形变化对水流结构的影响；文中对于风场的影响作了定性分析，同时根据实际需要对模型作了改进，如将仅支持长期资料调和常数的开边界条件改为可选择的短期调和常数边界和潮位边界，使二进制格式结果文件数据输出可以处理多点数据及流场等等。

The bifurcated flow, a common morphology of flow motion, usually occurs in natural rivers and headrace open channels etc. Controlled by its boundary, the bifurcated flow is complicated in structure and specialized in river evolution.

分汊流是常见的水流运动形态，常出现在天然河流、引水明渠等工程中，受边界控制，水流结构复杂，河道演变特殊。

The cross-river pipeline, the line headroom to meet the requirements of flood control and shipping.

跨越河道的管道、线路的净空高度必须符合防洪和航运的要求。

Mr. Holloway has over 4 years of experience with hydraulic analysis and design,watershed hydrology analysis, and river engineering.

他在水力分析和设计、流域水文计算、和河道工程有超过4年的工作经验。

Scoyenia ichnofacies widely occurs in flood plains and the transitional belts of rivers and lakes, Termitichnus ichnofacies owns features of continental environment, Rusophycus ichnofacies made its appearance in river channel and levee sub-environments of relative high energy, Arenicolites ichnofacies colonized on the surface of hummocky sandstones of storm deposits.

Scoyenia遗迹相广泛发育在洪泛平原、冲积平原以及河流与湖泊的过渡地带，Termitichnus遗迹相是陆地沉积环境的特征，Rusophycus遗迹相出现在河流沉积环境河道、堤岸等能量较高的亚环境。Arenicolites遗迹相在开阔湖风暴沉积的丘状砂岩层面上拓殖，主要由机会分子构成。

To protect environment and prevent the jeopardize of pollutant, working over hydraulic characteristic of pollutant diffusing is very content from the aspect of hydrodynamics and hydrokinetics.

为了保护环境，防止污染扩散的危害，因此，从流体力学和动力学方而着手研究污染物在河道中扩散的水力学特性是很有意义的。

Hydrometry ; sediment measurement ; river course survey ; river closure ; planning ; design ; the Three Gorges Project ; the Yangtze River

水文测验；泥沙测验；河道测量；规划；设计；截流；三峡水利枢纽；长江

As one of the hydrophyte, phytoplankton has a broad application.

同时，在河道水流有一定流速存在的水力特性条件下，水生植物是否可以达到预想的净化效果，这是我们急需得知的问题。

Were chosen to bulit a hydrophyte complex pond to purify sewage from Daqinghe, one main inflow river of Dianchi lake.

等4种不同生活型水生植物组成的水生植物塘系统，研究塘中不同植物对滇池入湖河道污水中氮、磷等指标去除效能的差异。

Ice discharge under ice jam or ice cover is the result from the combined effects of the thermal, hydraulic and boundary conditions.

冰塞或冰盖下输冰受热力、水力以及边界条件等影响，计算河道在稳封期的冰流量对计算冰塞厚度及冰期水位具有重要的意义。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。