同时提出岩石河床冲刷研究的关键课题。
At the same, it put forward the key subject on the rock riverbed scour study.
在许多情况下，这种河床冲刷是有利的。
该模型能同时对河床冲刷深度及粗化稳定级配进行计算。
The model can calculate scour depth of riverbed and armoring steady graduation simultaneously.
三峡工程水头高，流量大，下游河床冲刷成为人们的关注点。
The scouring the river bed before the Three Gorges Dam with high head and huge discharge has been given a special attention.
首先建立了一维数学模型研究顺直河道的河床冲刷及河床粗化过程。
ID numerical model is developed to simulate degradation and armoring process in alluvial channels.
为了调整上荆江河势及预测三峡工程兴建后上荆江河势变化趋势，分阶段进行了上荆江实体模型河势调整试验和河床冲刷试验研究工作。
In order to adjust Upper Jingjiang stretch fluvial regime and predict its change tendency after completion of TGP, a physical model study on Upper Jingjiang stretch was carried out at various stages.
本文根据丁坝作用后水槽中水流情况，采用动量方程结合试验资料，导出了丁坝下游主槽平均流速沿程变化的公式，以此为基础，提出了丁坝作用下河床冲刷段长度的计算公式。
According to the flow state in flume for spur and experimental data, the formulas for the mean velocity of main channel varying with distance downstream were derived with momentum principle.
由于河流冲刷和河床加积，沉积层多饱和多孔。
As a result of fluvial scouring and aggrading the riverbed, the alluvial layer is fluid-saturated porous medium.
数值实验表明，该模型能正确地模拟山区河流复杂的水流以及河床的冲刷、淤积过程。
The results show that the flow field and the process of riverbed erosion and deposition in mountain river can be simulated correctly by this method.
采用平面二维数值模拟方法，对溢洪道下游河床以破碎基岩为主的河流冲刷进行了模拟计算方法的探讨。
The plane two-dimension numerical simulation is used to study the simulation and calculation of the scour in a river whose bed is mostly cracked bedrock at the lower reaches of a spillway.
该泄洪消能系统大大减轻了下泄水流对河床基岩的冲刷作用，满足了该工程的泄洪消能任务。
This flood energy dissipation system has remarkably relieved the scouring effect of plunging flow on the river bedrock and met the project's requirements for flood energy dissipation.
三峡水库建成后，长江中下游河道将遭受长河段、长时期冲刷，河床河性会发生很大变化。
After completion of the Three Gorges Project, a long time erosion will occur in the middle and lower reaches of Yangtze river, and the characteristics of river channel will be changed obviously.
漂石河床的一般冲刷计算是迄今为止还在研究的课题。
Until now, calculation of general scouring in the boulder riverbed is still under research.
没有河床的冲刷，就不会有钻石的璀璨；
There are no glittering diamonds without the scouring of the riverbed;
试验结果表明：护坦减轻了下游纵向围堰左侧坝趾处的回流淘刷，隔流墩明显减轻了防冲墙附近河床的冲刷，确保了坝基和下游纵向围堰的安全。
The test results show that the apron can reduce back flow at the dam toe, and the piers can obviously diminish river bed scouring near the scour resistant wall.
数值计算结果表明，该模型在定性上能正确地模拟水流以及河床的冲刷、淤积过程。
The result shows that the flow field and the process of riverbed erosion and deposition can be simulated qualitatively by this method.
针对群桩墩处河床局部冲刷的复杂性，运用正态动床物理模型较好地预测了桥墩附近河床局部冲刷，并获得了现场监测结果的验证。
According to the local scouring around the pile foundation of the pylon, a normal movable-bed physical model test is conducted to predict the local scouring and is verified by the field measured data.
建坝后水库下泄水流挟带的床沙质含沙量减少，坝下游河床出现冲刷。
The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.
前言：河流穿越管道冲管段主要是在管道露出河床的基础上，由于冲刷现象使管底“淘空”而形成。
Because the pipeline fundus is "hollowed out" by the scouring phenomena, the scoured pipeline is formed.
模拟了粘性土河床的冲刷特性；
火星环球探测者已经发现了看起来是在接近现代的时间里被水冲刷出来的河床。
The Global Surveyor found gullies that appear to have been cut by water in relatively modern times.
当宋沙量小于输沙能力时，河床发生冲刷；
When the quantity of incoming sand is larger than the capacity of sand transportation, the channel degradation occurs;
当宋沙量小于输沙能力时，河床发生冲刷；
When the quantity of incoming sand is larger than the capacity of sand transportation, the channel degradation occurs;
应用推荐