Experiments to validate BlueLog: A versatile low-cost instrument for monitoring water level in coastal applications

Published: 22-07-2021| Version 2 | DOI: 10.17632/pwv8p9kxbb.2
Contributors:
Oscar Alvarez Silva,
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Description

This database include a set of laboratoy and field experiments carried out to validate a new instrument for measuring static and dynamic water column pressure is presented here. The instrument has been named BlueLog. Two types of pressure measurement tests were performed in the laboratory. First, hydrostatic pressure measurements were carried out during the (fast and slow) filling and emptying of a tank where the water remains at rest. Second, dynamic conditions were registered considering oscillatory flow in a wave flume (with dimensions of 25 m long, 1 m wide, and 1 m height) as waves propagate over the pressure sensors. Under hydrostatic and oscillatory flow conditions, a comparative performance analysis was carried out between BlueLog and two commercial wave/pressure sensors (RBRduo from RBR Ltd. and Aqualogger P520 from AQUATEC ltd.) to verify the reliability of the de-veloped sensor, taking as reference the commercial ones. Three different monochromatic wave heights were simulated in the wave flume for different tests: H1 = 0.07 m (Case 1), H2 = 0.10 m (Case 2), and H3 = 0.12 m (Case 3). Afterwards, the performance of the BlueLog was also validated under field conditions in Bocagrande beach (Cartagena, Colombian Caribbean Coast) in August 26th, 2017. BlueLog and RBR sensors were deployed in the surf zone of the beach in coordinates 10.399ºN, -75.564ºE considering a mean water depth of 1.2 m. Measurements were carried out for three different sea states changing the sampling frequency in both instruments between 6 Hz (Case 4), 4 Hz (Case 5), and 2 Hz (Case 6), considering data bursts of 2048 samples for all cases. File descriptions: Data of comparative performance analysis between BlueLog and two commer-cial wave/pressure sensors (RBRduo from RBR Ltd. and Aqualogger P520 from AQUATEC ltd.). The names of the files refer to the number of the figure in the associated maniscript where the data is shown. Data in Matlab format Three kind of validation test where carried out: 1. (Figure 5): hydrostatic pressure measurements were carried out during the (a) fast and b) slow) filling and emptying of a tank where the water remains at rest. 2. (Figure 6): dynamic conditions were registered considering oscillatory flow in a wave flume. Three different monochromatic wave heights were simulated in the wave flume for different tests: H1 = 0.07 m (Case 1), H2 = 0.10 m (Case 2), and H3 = 0.12 m (Case 3). 3. (Figure 7): Validation under field conditions in Bocagrande beach (Cartagena, Colombian Caribbean Coast). BlueLog and RBR sensors were deployed in the surf zone of the beach in coor-dinates 10.399ºN, -75.564ºE considering a mean water depth of 1.2 m. Measurements were carried out for three different sea states changing the sampling frequency in both instruments between 6 Hz (Case 4), 4 Hz (Case 5), and 2 Hz (Case 6), considering data bursts of 2048 samples for all cases.

Files