The sea level stops in a high position for a long time, so both drop of water and current velocity are small.
并且由于海平面高度相对稳定在较高位置，河流纵比降较小，流速也较小。
The movement and diffusion process of pollutants in current of water are affected by water temperature, local flow velocity and direction, stream shape, and so on.
由于污染物在水流中的扩散迁移过程受水温、局部流速与流向、河道形状等因素的影响。
The variation of seepage velocity, resistance coefficient, reservoir permeability and oil recovery in porous media of water-drive reservoir in direct current (DC) electric field are studied in detail.
实验研究了外加直流电场作用下水驱油藏多孔介质中的流体渗流速度、阻力系数、储层渗透率及原油采收率的变化特性。
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