水流

Based on an analysis of field data, it is expounded that the overbank flood is of strong capacity in sediment deposition on the flood plain and scouring in the main channel under the condition of continuous shrinkage of channels on the lower Yellow River.

通过实测资料分析，阐明黄河下游宽河道在持续萎缩的情况下漫滩洪水仍具有较强的淤滩刷槽的行洪特点，指出漫滩洪水造成的滩地淤积主要来自于滩槽水流泥沙的横向交换。

Some unique techniques including topographics smoothing, overbank flowing, numerical filtering, auto-adjusting of roughness were adopted in this numerical simulation, and ADI method was improved in sweep by two-direction and two-step scanning.

数值模拟中还采用了地形平滑、水流漫滩、数值滤波及自动调糙率等几种处理技术，并对ADI法进行了双向双步扫描改进。

This paper aims to analyze the stratigraphic and petrological characteristics, the palaeocurrent , and the clastic compositions of Xueshan Formation.

本文重点研究了雪山组的地层特征、古水流特征以及砂岩碎屑组分特征，在此基础上简单分析了其沉积相特征。

Norphel created his first artificial glacier in Phuktse Phu village in 1987, simply by diverting a watercourse, reducing its volume and velocity, and then making it accumulate in the shadow of a hill.

1987年，诺菲尔在福柯茨夫村制成了第一座人造冰川。方法很简单，他让一条水流改道，降低它的容量和流速，然后使它在一座山的阴影下聚集。

Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points ...

通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知，当地下水流处于稳定状态且满足Dupuit假设时，可以根据同一垂直线上界面之下咸水带任意点的咸水测压水头和界面之上淡水带任意点的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。

Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points in both the salt water and fresh water zones reveals that the location of the fresh water-salt water interface in a coastal homogeneous, isotropic unconfined aquifer can be estimated based on piezometric heads at two points in the same vertical line tapping respectively the salt water zone and the fresh water zone (from the water table to the interface) when the groundwater flow system is in a steady state and satisfies the Dupuit assumption.

通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知，当地下水流处于稳定状态且满足Dupuit假设时，可以根据同一垂直线上界面之下咸水带任意点的咸水测压水头和界面之上淡水带任意点的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。

The non-structure grid is used for complex irregular boundary processing. An efficient algorithm PISO is used for the model and it can correct the bias of the mesh, so it can reduce iterative times. The flow pattern, energy dissipation ratio and velocity field are obtained.

根据不同的运行工况，利用计算流体力学软件FLUENT对无压隧洞洞内消能工的水流流态进行了二维简化数学模型的数值模拟，在求解过程中采用混合结构网格来处理复杂的边界形状；采用了效率较高PISO算法进行计算，在计算过程中进行了相邻校正和偏斜校正，减少了达到收敛所需的迭代次数。

Key words: ecological restoration; acoustic Doppler velocimeter; Pistia stratiotes; hydrodynamic behavior; planting mode; velocity distribution

关键 词：生态修复；超声波多普勒测速仪；大吀；水流特性；种植方式；流速分布

Combining the specific hydrogeological structure and related parameters, the pumpage and its composition were calculated by a three-dimensional finite difference method.

结合具体的水文地质结构及有关参数，采用地下水流三维有限差分法计算了各渗流井的出水量及其组成。

As an unloader it does essentially the same thing except that when you close the gun the unloader traps the pressure in the hose and locks the unloader open, allowing all the water the pump is pumping to recirculate back to the inlet.

当系统压力超过弹簧张力时，水流从喷嘴回流到泵进口，进行循环。

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。