压力式验潮仪在航道水深测量中的应用

压力式验潮仪具有成本小、操作简单、布设方便且性能稳定等优点，在水深测量中具有明显优势。结合中缅原油管道项目原油码头及航道通航水域复测工程实际情况，从大气压、水密度及零点漂移3个方面分析了影响压力式验潮仪数据误差的主要因素，得出如下结论：同步观测大气压的变化，可以消除或降低大气压变化的影响；减小验潮仪的投放深度和采用底层海水密度计算潮位数据可显著降低海水密度变化产生的影响；比较多个验潮仪在空气中同步观测的大气压值，以确定其零点漂移校正值。结合项目实际情况，介绍了同步验潮法高程传递。

Application of pressure tide gauge in waterway bathymetry

Due to the advantages of low cost,simple operation,convenient layout and stable performance,the pressure tide gauge has obvious advantages in depth measurement.Based on the actual situation of the project of the re-survey of crude oil wharf and navigable waters of China-Myanmar crude oil pipeline,the main factors affecting the data error of pressure tide gauge are analyzed in three aspects:atmospheric pressure,water density and zero drift.The following conclusions are drawn:synchronous observation of atmospheric pressure changes can eliminate or reduce the impact of atmospheric pressure changes;reducing the depth of the tide gauge and calculating the tidal data by using the bottom seawater density can significantly reduce the influence of the change of seawater density;by comparing the atmospheric pressure values observed synchronously by several tide gauges in the air at the same time,the correction value of zero drift can be determined.Combining with the actual situation of the project,the elevation transfer of synchronous tide gauge method is briefly introduced.