河岸码头建筑物势必导致其上游水位壅高及对码头附近水流流态产生影响。
A dock construction built on a river bank causes naturally the water level upstream to rise and influences the local flow pattern.
冰塞洪水，大量冰花与碎冰在盖面冰下集聚，造成上游水位显著壅高的现象。
Ice jam flood: a lot of frazil ices and crushed ices gather under the covering ice, causing heading up of water level of upper reach.
下游水位越高，变化相同的上游水位时，轴向流速沿径向分布的变化程度越大。
The bigger the downstream water level, the outstanding of variation degree of axial velocity along radius distribution when upstream water level is same.
随上游水位的降低及下游水位的升高，切向流速最大值点也不断向管中心一侧移动。
With the upstream water level reducing and the downstream water level increasing, the highest tangent velocity also moving to the pipe center.
利用所编写的非稳定渗流计算程序，计算土石坝上游水位变化时自由面位置随时间的变化规律、孔隙水压力的分布情况。
The program is utilized to calculate soil rocks dam free surface position variation and pore-water pressure distribution condition with time when the up water level position changed.
冰块堆积，堵塞和聚集形成的冰坝、冰盖和冰塞会导致河道阻力增加，致使上游水位上涨，并可能造成冰期洪水，建筑物破坏，航运不畅等危害。
Ice dam, ice cover and ice jam, which are formed by stack, jammed and collective ice, can increase river resistance and water stage, resulting in flood, construction damage and navigation problems.
冰块堆积，堵塞和聚集形成的冰坝、冰盖和冰塞会导致河道阻力增加，致使上游水位上涨，并可能造成冰期洪水，建筑物破坏，航运不畅等危害。
Ice dam, ice cover and ice jam, which are formed by stack, jammed and collective ice, can increase river resistance and water stage, resulting in flood, construction damage and navigation problems.
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