Improved Water Level Measurement System

This project provides an improved design for the dual-orifice bubble gauge for water level observations in cold regions. The improvements consist of using optimized true-differential sensors and specialized processing to improve the accuracy, particularly in the presence of water waves. The prototype will be designed based on a numerical model of the dual-orifice gauge that includes the time-dependent effects of waves - - both the instantaneous pressure and the mean dynamic wave pressure. The model will be provided in Matlab. The prototype unit will be constructed and evaluated in a wave tank to verify the overall improvements, provide data for the development of algorithms for pressure corrections, and the operational characteristics of the prototype. The resultant sensor design should work well for NOS in the cold regions, non-cold regions, and have a wide market for the many other groups making bubble gauge measurements