Protection design for lower reaches of the Yellow River was once a difficult question due to high water head, various combinations of discharging structures, and complex flow pattern.
小浪底工程由于水头高、泄水建筑物组合多，水流流态十分复杂，下游防护设计是一难题。
The type of flow would affect the calculation of water head losses.
管内流态的变化会影响水头损失的计算。
It is also part of the watertight envelope, and subject to the local water head.
它也是水密外壳的组成部分，并承受局部水压力。
Inspection air pressure test(with water head) for No1. water ballast tank(No15 block).
No1压载水舱（No.15分段）气压试验（压头试验）检查。
Higher water head closure has become a trend with the development of river way closure.
从河道截流的发展趋势来看，高水头截流已成为一种趋势。
Generating according to constant water head could improve the hydropower plant's economy benefit.
恒水头发电能使单位体积的水发出更多的电能，从而提高水电厂的经济效益。
In the navigation buildings of high water head, the cost of ship lift is generally lower than ship lock.
在高水头的通航建筑物中，升船机的造价通常低于船闸。
Duber Khwar Hydropower Project is a diversion type power station characterized by high water head and long tunnel.
巴基斯坦杜伯华水电站工程是一项高水头、长隧洞、引水式水电站工程。
When the system is confined well, the change of observation water level has a linear relation with water head change.
在系统封闭很好的情况下，观测水位的变化基本与水头的变化呈线性关系。
The turbine for the Three Gorges Project is one of the mixed-flow turbines with great changes of operation water head.
三峡电站水轮机是运行水头变幅最大的混流式水轮机之一，其外形尺寸和重量亦是当前混流式水轮机之最。
The utility model has the advantages of high speed of filtering, small loss of water head, and generous content of dirt.
无密实核心。具有滤速高、水头损失小、含污量大的优点。
The airfoil-shaped measuring flume water head loss isn't higher, and the water head losing has 14% of the total head of water.
机翼形量水槽的水头损失不大，水头损失约占上游总水头的14%左右。
Because of the high water head and high flow speed, the aeration for preventing cavitation erosion becomes more and more important.
由于水头高，流速大，明流泄洪洞的掺气减蚀越来越受到重视。
Hydraulics in water releasing structures with high water head and large discharge capability has been paid close attention recently.
高水头、大泄量的泄水建筑物水力学问题是水利工程建设中特别受关注的问题之一。
By comparing the calculated water head, shaft power and efficiency with the experimental results, the method was proved to he feasible.
计算了泵的扬程、轴功率和效率，并与试验进行了对比，验证了计算方法的可行性。
Due to the high water head of the GHS, the design unit put forward a suggestion of using the pre stressed reinforced concrete spiral case.
高坝洲水电站由于设计水头较高，设计单位建议采用预应力钢筋混凝土蜗壳。
Model test indicates the conclusion is reliable and can be applied to large size inverted siphon with a low water head and great flow rate.
结论对南水北调中线工程和平原地区的低水头大流量倒虹工程弯管设计具有重要的应用价值。
Formulas are also induced to calculate the thickness of aquifer and water head in any point between the two points in which groundwater table is given.
推导了利用已知两点地下水位求解其间任一点地下水位和含水层厚度的求解公式。
With the model, many parameters can be obtained such as water head, equivalent mechanical fissure width, seepage coefficient, and hydraulic gradient etc.
应用该模型可计算出二维裂隙网络中任意交点（内结点）的水头、等效水力隙宽、渗透系数、水力梯度等参数。
However, it is very unpopular for this kind of bifurcation to be laid above the ground surface, especially in the case of large diameter and high water head.
但布置在地面上的明式月牙肋钢岔管尚不多见，特别是当钢岔管承受的水头和直径较大时。
By using this method presented in this paper, not only the optimum design of main pipe net was given, but the water head and flow and pump type were decided.
所提出的方法，不仅能得出一个优化的干管管网，而且还能确定出所需水泵扬程及流量，并确定水泵型号。
Numerical analyses are performed to analyze the water head controlling effect on the tunnel face by drainage holes during the construction of subsea tunnels.
通过数值模拟计算，分析了在海底隧道的施工期，从隧道工作面通过排水孔泄水的效果。
The process and result of the experiment shows in the scheme the assumption of water head diversion by 50% and water-saving rate by 50% is feasible and practical.
试验过程及结果表明，该方案削减船闸工作水头约50%，船舶一次过闸省水率约50%的设想是可行的，合乎实际的。
Gradation of sand column and sediment concentration of muddy water and water head are remarkably effective factors for the fine grain distribution in sand column.
砂柱的颗粒组成、水含沙量和入渗水头对滞留分布产生显著的影响。
In the process of making optimal load dispatch plan in hydroelectric plants, it is usually supposed that the water head of the hydroelectric plant is not changing.
在水电站制定厂内机组最优负荷分配时一般都假设水电站的水头是不变的。
In design of pumped storage station or high water head hydro-power station, it is important to evaluate the rock infiltration properties under practical water pressure.
在高水头电站、抽水蓄能电站设计中，需要查明岩体在实际水头作用下的透水率、渗透特性。
In water conservancy and hydropower projects ot plain, the large quantities of small power station of low water head and large discharge have been built in our country.
在平原地区水利水电工程中，我国建造了一大批低水头、大流量的小型水电站。
The stability of a water cushion pool by the action of high water head and large flood-discharge power is one of the key technologies which relate to its safe operation.
高坝水头高、泄洪功率大，下游水垫塘的稳定性是其能否安全运用的关键性技术之一。
The time and spatial effects of excavation considering the variation of water head difference between the inside and the outside of a foundation pit were then investigated.
研究了考虑坑内外水头差变化时的基坑工程时间效应和空间效应，并与不考虑坑内外水头差变化的情况进行了对比。
Numerical analysis and a drainage performance analysis both show that the suggested horizontal pre-drainage system provides a clear drainage and water head reducing effect.
数值分析及排水效果均表明，所提出的水平预排水系统能及时排水并减小水压力。
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