基于LADCP观测获取近海底处流速剖线的改进方法

An Improved Method to Obtain the LADCP Velocity Profile Near the Seabed

针对目前根据LADCP回波强度判断海底深度不准确,反演的流速剖面存在较大误差的情况,本文提出1个改进方法,通过综合利用LADCP的相关数参量及近海底处样本点数目随着深度的变化等信息,有效地判别海底深度,缩小与真实水深的差据,并且得到较为准确的近海底处的流速剖线信息,为研究近海底边界层内的动力过程提供了有效的观测数据。

The water depth determined by echo magnitude observed by LADCP is not accurate, and the velocity profile near the seabed has a significant error. In order to remove these disadvantages, an improved method was put forward in this paper. For the improved method, both the correlation parameter and the sample number variation with depth were used to determine the water depth. The results suggest that the water depth derived from this improved method agree well with the true value, and the velocity profile near the seabed is more accurate. The information in the boundary layer near the seabed can be analyzed well through this improved method.