本文概述了地方铅垂线变化震前异常的原因、监测网的建立、研究进展以及展望。
The paper outlines the cause of anomalous local plumb-line variations before earthquakes; the establishment of monitoring networks; the progress and prospect of research.
本文分析了引起强震前天文测时测纬异常现象的原因问题，认为这种异常主要是地下水活动引起垂线变化的结果。
The question of the cause of the anomalous deviation of the results of the astronomical time and latitude determinations before a strong earthquake has been analysed in this paper.
利用该流速分布模型，得到挟沙水流的卡门常数沿垂线是变化的结论，即从近底区的约0.4渐变到主流区的小于0.4。
By use of this model, it is demonstrated that the Karman constant is varied in vertical distance from near (0.4) in near bed region to below (0.4) in main flow region.
通过室内水槽模型试验，探讨了有低矮植被生长的河道糙率变化、时均流速的垂线分布以及紊动强度的垂向变化规律。
By the indoor flume model experiment, the changing law of vertical velocity distribution and turbulent intensity of submerged vegetation channel linings are discussed.
通过简化宽浅明渠二维水流运动方程，得到垂线平均流速在横向变化的微分方程序。
In this paper, a differential equation of describing the lateral distribution of depth averaged velocity is obtained by simplifying 2d shallow water equations of open channel flow.
通过简化宽浅明渠二维水流运动方程，得到垂线平均流速在横向变化的微分方程序。
In this paper, a differential equation of describing the lateral distribution of depth averaged velocity is obtained by simplifying 2d shallow water equations of open channel flow.
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