The increasing frequency of extreme storm events has implications for the operation of sewer systems, storm water, flood control monitoring and tide level variations. Accurate and continuous monitor water level monitoring is demanded in different environments. Piezoelectric sensors are widely used for water level monitoring and work submerged in waters subject to the presence of solid particles, biological fouling and saltwater oxidation. This work aimed to develop a simple, low-cost methodology to protect sensors over long-term deployment. The results show that simple actions, costing less than 2 EUR, can protect and extend the lifecycle of equipment worth over 2000 EUR, ensuring continuous monitoring and maintaining quality measurements.
The Santa Catarina Tide Gauge Network (SCTGN) is a continuous sea level monitoring system to support fishery, aquaculture, and navigation in general. Deployed in the state of Santa Catarina, Brazil, the initiative started in 2012 with one tide gauge at the Santa Catarina Island South Bay to support aquaculture research projects and hydrodynamic numerical modelling. By 2020, the SCTGN was fully operational, consisting of 11 tide gauge stations along the 450km of the Santa Catarina coastal line. The next step is standardizing these tide stations to international data collection protocols. Knowledge of the effects different programming protocols have on data collection are important since they may affect the results. Data from a radar gauge (RG) and a vented (or relative) pressure gauge (VPG) were obtained over six months. The difference between RG and VPG measurements showed a 5.07cm2 variance. Percentage of reading errors was 0.03% and 0.77% for RG and VPG, respectively. This study aims to evaluate the feasibility of the SCTGN data collection protocol in the RG to comply with the Intergovernmental Oceanographic Commission (IOC) recommendations for sea level monitoring. We find that an RG gauge using the SCTGN protocol is adequate to monitor sea levels and has an easier installation and maintenance, and more stable vertical datum control.
O objetivo deste trabalho foi caracterizar os quatro principais eventos de inundação costeira ocorridos na CostaCatarinense no período 2012 a 2020, associando os dados registrados na rede maregráfca da Epagri aos sistemas atmosféricos atuantes no período. Os eventos ocorreram nos meses de outono, inverno e primavera e apresentaram característcas similares. Os valores mais altos de maré registrados estão entre 2,0 e 2,5m. Uma diferença encontrada entre os eventos foi o número de inundações costeiras, que variou de 1 a 4 inundações/evento. Foi observado que ciclones extratropicais, situados mais ao sul do Uruguai, provocaram 4 a 5 inundações/evento, enquanto ciclones extratropicais situados entre o Uruguai e o Rio Grande do Sul, entre 1 e 2. Considerando 42 inundações, verifcou-se que o percentual de maré acima da prevista fcou entre 30-50%, 51-70%, 71-90% e >90%, em 12 ,16, 13 e 1 episódios, respectvamente.
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