水流

State-owned mineral resources and waters as well as forest land, mountains, grasslands, unreclaimed land and beaches owned by the state and those that are lawfully owned by collectives may not be sold, leased, mortgaged or illegally transferred by any other means.

国家所有的矿藏，水流，国家所有的和法律规定属于集体所有的林地，山岭，草原，荒地，国家所有的矿藏，水流，国家所有的和法律规定属于集体所有的林地，山岭，草原，荒地，滩涂不得买卖，出租，抵押或者以其他形式非法转让。

The flow on natural slope land is a kind of compound flow whose velocity takes a direct ratio with water depth.

天然坡地水流是一种混合状态的水流，其流速与水深成正比。

At present, two primary methods are used to deal with the source/sink term in advective and dispersive transport equation of suspended sediment when studying on estuary and coastal sediment movement.

目前在研究河口海岸泥沙冲淤变化中，对泥沙输运方程中的源汇项进行处理时，国内常用水流挟沙能力的方法，国外多以水流剪切应力为基础。

The flow discharge at that point can be used as the estimated value of the bankfull discharge.

若以流量为参数，高含沙水流含沙量与流量构成一维离散动力系统；对于一般挟沙水流，含沙量随流量演化过程中的临界点，出现在流量与含沙量乘积为某一定值之时，该临界点处流量为平滩流量估算值。

The most heavy flow ability of barrage swirl is controlled by fastenning device and barrage size, the most heavy discharge is more when barrage aperture is bigger, the influence of barrage position on discharge is not obvious; The pressure of the end of the shaft and fastenning device increases which aroused by barrage, and there is a restraining action to flow waving of the shaft; The barrage aperture is smaller, the increase of pressure is heavier, the influence of position to the increase of pressure is not obvious; The positive pressure of the level section in the hole between fastenning device and barrage increases obviously, the change of press along length reduces, mural press in the hydrosphere separating area of outlet of fastenning device becomes positive pressure, which is propitious to the increase of flow cavitate number in the low pressure area of the outlet of fastenning device; The influence of change of swirl cavum diameter caused by barrage to ventilating state is obvious.

阻塞旋流最大泄流能力由起旋器及阻塞体型共同控制，降低了泄洪洞的泄流量，孔径大的阻塞最大下泄流量较大，阻塞位置对泄流量的影响不明显；阻塞引起竖井及起旋器端头压力增大，对竖井部分的水流波动具有抑制作用；阻塞孔径越小，压力增加越大，位置对压力增大影响不明显；起旋器与阻塞之间水平洞段的止压力明显增加，沿程压力变化减小，起旋器出口的水气分离区壁面压力变为正压力，有利于起旋器出口低压区水流空化数的提高；阻塞引起的旋流空腔直径变化对通气状态产生明显影响。

Allusions to a mountain stream cascading down a sloping hillside are evident but not cloyingly"natural-istic"as the bed of the watercourse is filled with pieces of tumbled,recycled glass arranded in an intensely colored,serpentine pattern.

就好像从高山上沿着陡坡流下来，但是没有水流看起来自然，因为真正的水流波涛汹涌，而水渠是用各种颜色的回收玻璃做成的蜿蜒的水沟形状！

The flow rate has a significant effect on the sensor placed countercurrently and has little effect on the sensor placed concurrently.So the sensor should be placed concurrently in application to decrease the effect of flow rate.

流速对逆水流方向传感器的影响大于顺水流方向，因此实际应用时传感器应顺水流方向放置，以减小流速的影响。

The wave is the core problem of low Fr. current .In order to make diffluent piers with low ridge to be popularized and applied, the surface wave of low Fr. current is chosen as the research object .We measure the surface wave elements and the velocity distribution of various diffluent piers scheme by the experiment of physical model. We also analyze the average wave height, the the average value of the square of wave , unit width of the waves energy , the probability density distribution of wave height ,and the power chart character, so as to reveal the weakening wave mechanism of the diffluent piers .

低Fr水流的核心是波浪问题，为了低坎分流墩的推广应用，本研究以低Fr水流的表面波浪作为研究对象，通过物理模型试验，对各种分流墩方案消能工的下游水面波浪要素、流速分布进行测试，分析低坎分流墩下游波浪的平均波高、均方根、单宽波能、波高概率密度分布及功率谱特性变化规律，从而揭示了低坎分流墩的削波机理。

Indoor model test for hydraulic characteristics of common floating vegetation channels in ecological restoration was carried out. Healthy Pistia stratioes linn was planted in the rectangle model river-course in different shapes. The velocity of flow in different situation was measured by three-dimensional acoustic Doppler velocimeter. The change of the rule of velocity was analyzed.

通过在矩形水槽中按不同方式种植个体较小、生长旺盛的大吀进行室内模型试验研究，利用三维超声波多普勒测速仪（acoustic Doppler velocimeter， ADV）分别测量按不同形状种植漂浮植被的矩形水槽中水流的瞬时流场，分析了植被附近区域水流在种植植被前后沿垂线方向的流速分布规律。

This paper uses a physical model to check the reliability of the numerical modeling proposed by Chen. As an example, this paper deals with a horizontal well pumpage underneath a river bed, or a vertical well adjacent to the bank of the river. We use the numerical method of Chen to simulate the groundwater flow pattern of the physical model.

论文针对具有典型意义的河床下水平井或傍河垂直井地下水流问题做了砂槽物理模拟，并用基于&渗流－管流耦合模型&和&等效渗透系数&的数值方法仿真模拟了此条件下地下水流的规律。

Life. But the intrinsic way of the Internet by wire confines accessing and using of the network information.

然而，Internet固有的有线连接方式大大限制了人们对网络信息的访问和使用。

I have a strong persuasion that this is true .

我坚信这是正确的。