µ-Nautilus, an autonomous lightweight profiler with depth control and configurable sampling time Isabel P. Morales-Aragón Technical University of Cartagena, Spain Roque Torres-Sánchez Technical University of Cartagena, Spain Javier Gilabert Technical University of Cartagena, Spain Fulgencio Soto-Valles Technical University of Cartagena, Spain This is a section of Tenth InternationaSymposium Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques(DOI: 10.36253/979-12-215-0556-6) by Laura Bonora, Marcantonio Catelani, Matteo De Vincenzi, Giorgio Matteucci Firenze University Press Florence 2024 https://doi.org/10.36253/979-12-215-0556-6.84

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Coastal lagoons, such as Mar Menor, hold significant ecological importance but are vulnerable to environmental disruptions from resource exploitation. Continuous monitoring is crucial for understanding critical situations and assessing recovery efforts. Manual sampling, as used in Mar Menor, is costly and yields limited results. Therefore, demand exists for automatic methods to enhance data collection and reduce operational tasks. This paper presents the design of a compact autonomous submersible profiler, µ-Nautilus, building upon the previous s-Nautilus model. It weighs 11 kg, which is half the weight of its predecessor. µ-Nautilus aims to stop at a configurable depth with less than 20 cm depth error using a single 750 cm3 ballast tank for control. Cascade control is employed, and satisfactory depth control (±15 cm error) is obtained during tests at sea. µ-Nautilus is powered by batteries with a capacity of 12.8Ah and 11.1V to run the ballast tank and 16.75Ah and 3.6V for the rest of the electronics. It can operate autonomously for 48 days performing cycles every 6 hours, suitable for the cleaning frequency needed due to fouling in Mar Menor.

 Profiler Sensor platform WSN Depth control Mar Menor

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References CARM. - Canal Mar Menor - Servicio de información y atención a la ciudadanía sobre el Mar Menor, Retrieved May 13, 2024, from https://canalmarmenor.carm.es/ Engel KG, A. - Piston Tank Type EA/TA/XP - Technical Specifications, Retrieved May 13, 2024, from https://engel-modellbau.eu/shop/out/media/Piston-Tank-Info_v4.pdf Iriarte, J. L., González, H. E., Liu, K. K., Rivas, C., & Valenzuela, C. (2007) - Spatial and temporal variability of chlorophyll and primary productivity in surface waters of southern Chile (41.5–43° S), Estuarine, Coastal and Shelf Science, 74 (3), 471–480. 10.1016/J.ECSS.2007.05.015 Lamas Rodríguez, M., Garcia Lorenzo, M.L., Medina Magro, M. et al. (2023) - Impact of climate risk materialization and ecological deterioration on house prices in Mar Menor, Spain, Sci Rep 13, 11772. 10.1038/s41598-023-39022-8 Maté-Sánchez-Val, M., Aparicio-Serrano, G. (2023) - The impact of marine pollution on the probability of business failure: A case study of the Mar Menor lagoon, Journal of Environmental Management, Volume 332. 10.1016/j.jenvman.2023.117381 Morales Aragón, I. P., Gilabert Cervera, J., Torres Sánchez, R., & Solo Vallés, F. (2023) - Development of an autonomous submersible profiler with the ability to stop at specific depths for measurement of marine parameters, Proceeding of the 10th International Workshop on Marine Technology (MARTECH 2023), Volume 22, pp. 30–31. 10.1109/ACCESS.2020.2973771 Morales-Aragón, I. P., Soto-Valles, F., Domingo González-Teruel, J., Jiménez-Buendía, M., & Torres-Sánchez, R. (2022) - Control de plataforma perfiladora submarina empleando propulsores y lastres dinámicos, Proceedings of the XLIII Jornadas de Automática, Logroño, Spain, 7-9 September 2022, pp. 23–30. 10.17979/spudc.9788497498418.0023 Pérez-Ruzafa, A., S. Campillo, J.M. Fernández-Palacios, A. García-Lacunza, M. García-Oliva, H. Ibañez, P.C. Navarro-Martínez, M. Pérez-Marcos, I.M. Pérez-Ruzafa, J.I. Quispe-Becerra, A. Sala-Mirete, O. Sánchez, C. Marcos. (2019) - Long-Term Dynamic in Nutrients, Chlorophyll a, and Water Quality Parameters in a Coastal Lagoon During a Process of Eutrophication for Decades, a Sudden Break and a Relatively Rapid Recovery, Front. Mar. Sci., 11 February 2019, Volume 6. 10.3389/fmars.2019.00026 Stokstad, E. (2022) - This lagoon is effectively a person, new Spanish law says, Science 2022. 378 (6615):15-16. 10.1126/SCIENCE.ADF1848 Zamora-López A, Guerrero-Gómez A, Torralva M, Zamora-Marín JM, Guillén-Beltrán A, López-Martínez de la Plaza P, Oliva-Paterna FJ. (2022) - Fish Assemblage Response to Eutrophic-Mediated Environmental Stress Events in the Mar Menor Coastal Lagoon (SE of Spain). Biology and Life Sciences Forum. 13(1), 5. 10.3390/blsf2022013005