{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T16:35:37Z","timestamp":1776357337219,"version":"3.51.2"},"reference-count":58,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T00:00:00Z","timestamp":1595203200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/CCI-COM\/30142\/2017"],"award-info":[{"award-number":["PTDC\/CCI-COM\/30142\/2017"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Global climate change originates frequent floods that may cause severe damage, justifying the need for real-time remote monitoring and alerting systems. Several works deal with LoRa (Long Range) communications over land and in the presence of obstacles, but little is known about LoRa communication reliability over water, as it may happen in real flooding scenarios. One aspect that is known to influence the communication quality is the height at which nodes are placed. However, its impact in water environments is unknown. This is an important aspect that may influence the location of sensor nodes and the network topology. To fill this gap, we conducted several experiments using a real LoRa deployment to evaluate several features related to data communication. We considered two deployment scenarios corresponding to countryside and estuary environments. The nodes were placed at low heights, communicating, respectively, over the ground and over the water. Measurements for packet loss, received signal strength indicator (RSSI), signal-to-noise ratio (SNR) and round-trip time (RTT) were collected during a period of several weeks. Results for both scenarios are presented and compared in this paper. One important conclusion is that the communication distance and reliability are significantly affected by tides when the communication is done over the water and nodes are placed at low heights. Based on the RTT measurements and on the characteristics of the hardware, we also derive a battery lifetime estimation model that may be helpful for the definition of an adequate maintenance plan.<\/jats:p>","DOI":"10.3390\/s20144034","type":"journal-article","created":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T10:59:38Z","timestamp":1595242778000},"page":"4034","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Evaluation of LoRa Technology in Flooding Prevention Scenarios"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5351-5580","authenticated-orcid":false,"given":"Jos\u00e9","family":"Cec\u00edlio","sequence":"first","affiliation":[{"name":"LASIGE, Faculdade de Ci\u00eancias, Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2369-0115","authenticated-orcid":false,"given":"Pedro M.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"LASIGE, Faculdade de Ci\u00eancias, Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5522-5739","authenticated-orcid":false,"given":"Ant\u00f3nio","family":"Casimiro","sequence":"additional","affiliation":[{"name":"LASIGE, Faculdade de Ci\u00eancias, Universidade de Lisboa, 1749-016 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,20]]},"reference":[{"key":"ref_1","unstructured":"Lancellotti, E. (2018). Confliting Cases pf Community Resilience to Extreme Weather Events: Evidence from Europe, North America, India and the Philippines, Universit\u00e0 Cattolica Del Sacro Cuore."},{"key":"ref_2","unstructured":"Kelman, I. (2020). Disaster by Choice: How Our Actions Turn Natural Hazards into Catastrophes, Oxford University Press."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"E2271","DOI":"10.1073\/pnas.1414439112","article-title":"Declining vulnerability to river floods and the global benefits of adaptation","volume":"112","author":"Jongman","year":"2015","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Cook, H.F. (2017). The Protection and Conservation of Water Resources, Wiley Online Library.","DOI":"10.1002\/9781119334316"},{"key":"ref_5","unstructured":"Baig, M.S.S., and Rajalakshmi, P. (2019). Wireless Sensor Network for Real Time Pollution Monitoring and Smart Grid Applications. [Ph.D. Thesis, Indian Institute of Technology Hyderabad]."},{"key":"ref_6","unstructured":"Falih-Al-Khalidi, A.M., and Al-Asady, R.K.A. (2019). Environmental Monitoring of the Shatt Al-Diwaniyah River Water Quality using GSM Wireless Remote Sensing Technology (WSN), IOP Publishing."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Grover, K., Kahali, D., Verma, S., and Subramanian, B. (2020). WSN-Based System for Forest Fire Detection and Mitigation. Emerging Technologies for Agriculture and Environment, Springer.","DOI":"10.1007\/978-981-13-7968-0_19"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Sanchez-Iborra, R., Sanchez-Gomez, J., Ballesta-Vi\u00f1as, J., Cano, M.D., and Skarmeta, A. (2018). Performance evaluation of LoRa considering scenario conditions. Sensors, 18.","DOI":"10.3390\/s18030772"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"855","DOI":"10.1109\/COMST.2017.2652320","article-title":"Low power wide area networks: An overview","volume":"19","author":"Raza","year":"2017","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_10","unstructured":"(2019, November 24). LoRa Alliance\u00ae. Available online: https:\/\/lora-alliance.org\/."},{"key":"ref_11","unstructured":"Semtech (2019, November 24). Semtech SX1276. Available online: https:\/\/www.semtech.com\/products\/wireless-rf\/lora-transceivers\/sx1276."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"317","DOI":"10.1109\/T-VT.1980.23859","article-title":"Empirical formula for propagation loss in land mobile radio services","volume":"29","author":"Hata","year":"1980","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Sommer, C., Joerer, S., and Dressler, F. (2012, January 14\u201316). On the applicability of two-ray path loss models for vehicular network simulation. Proceedings of the 2012 IEEE Vehicular Networking Conference (VNC), Seoul, Korea.","DOI":"10.1109\/VNC.2012.6407446"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Harinda, E., Hosseinzadeh, S., Larijani, H., and Gibson, R.M. (2019, January 15\u201318). Comparative Performance Analysis of Empirical Propagation Models for LoRaWAN 868MHz in an Urban Scenario. Proceedings of the 2019 IEEE 5th World Forum on Internet of Things (WF-IoT), Limerick, Ireland.","DOI":"10.1109\/WF-IoT.2019.8767245"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2366","DOI":"10.1109\/JIOT.2019.2906838","article-title":"LoRaWAN Network: Radio Propagation Models and Performance Evaluation in Various Environments in Lebanon","volume":"6","author":"Lahoud","year":"2019","journal-title":"IEEE Internet Things J."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Petajajarvi, J., Mikhaylov, K., Roivainen, A., Hanninen, T., and Pettissalo, M. (2015, January 2\u20134). On the coverage of LPWANs: Range evaluation and channel attenuation model for LoRa technology. Proceedings of the 2015 14th International Conference on ITS Telecommunications (ITST), Copenhagen, Denmark.","DOI":"10.1109\/ITST.2015.7377400"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Oliveira, R., Guardalben, L., and Sargento, S. (2017, January 3\u20136). Long range communications in urban and rural environments. Proceedings of the 2017 IEEE Symposium on Computers and Communications (ISCC), Heraklion, Greece.","DOI":"10.1109\/ISCC.2017.8024627"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Goursaud, C., and Gorce, J.M. (2015). Dedicated networks for IoT: PHY\/MAC state of the art and challenges. EAI Endorsed Trans. Internet Things.","DOI":"10.4108\/eai.26-10-2015.150597"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Bor, M.C., Roedig, U., Voigt, T., and Alonso, J.M. (2016, January 13\u201317). Do LoRa low-power wide-area networks scale?. Proceedings of the 19th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, Valletta, Malta.","DOI":"10.1145\/2988287.2989163"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Bor, M., and Roedig, U. (2017, January 5\u20137). LoRa transmission parameter selection. Proceedings of the 2017 13th International Conference on Distributed Computing in Sensor Systems (DCOSS), Ottawa, ON, Canada.","DOI":"10.1109\/DCOSS.2017.10"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1466","DOI":"10.3390\/s16091466","article-title":"A study of LoRa: Long range & low power networks for the internet of things","volume":"16","author":"Augustin","year":"2016","journal-title":"Sensors"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Rahman, A., and Suryanegara, M. (2017, January 16\u201318). The development of IoT LoRa: A performance evaluation on LoS and Non-LoS environment at 915 MHz ISM frequency. Proceedings of the 2017 International Conference on Signals and Systems (ICSigSys), Bali, Indonesia.","DOI":"10.1109\/ICSIGSYS.2017.7967033"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1007\/s10776-017-0341-8","article-title":"Evaluation of LoRa LPWAN technology for indoor remote health and wellbeing monitoring","volume":"24","author":"Mikhaylov","year":"2017","journal-title":"Int. J. Wirel. Inf. Netw."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Lauridsen, M., Vejlgaard, B., Kovacs, I.Z., Nguyen, H., and Mogensen, P. (2017, January 19\u201322). Interference measurements in the European 868 MHz ISM band with focus on LoRa and SigFox. Proceedings of the 2017 IEEE Wireless Communications and Networking Conference (WCNC), San Francisco, CA, USA.","DOI":"10.1109\/WCNC.2017.7925650"},{"key":"ref_25","unstructured":"Mikhaylov, K., Petaejaejaervi, J., and Haenninen, T. (2016, January 18\u201320). Analysis of capacity and scalability of the LoRa low power wide area network technology. Proceedings of the European Wireless 2016\u201422th European Wireless Conference, Oulu, Finland."},{"key":"ref_26","unstructured":"Bor, M.C., Vidler, J., and Roedig, U. (2016, January 15\u201317). LoRa for the Internet of Things. Proceedings of the International Conference on Embedded Wireless Systems and Networks (EWSN), TU Graz, Austria."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Mahmoud, M.S., and Mohamad, A.A. (2016). A Study of Efficient Power Consumption Wireless Communication Techniques\/Modules for Internet of Things (IoT) Applications, University of Embu. Computer Science and Communications.","DOI":"10.4236\/ait.2016.62002"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Casals, L., Mir, B., Vidal, R., and Gomez, C. (2017). Modeling the energy performance of LoRaWAN. Sensors, 17.","DOI":"10.3390\/s17102364"},{"key":"ref_29","unstructured":"Kazdaridis, G., Zographopoulos, I., Symeonidis, P., Skrimponis, P., Korakis, T., and Tassiulas, L. (2017, January 16\u201320). In-situ Power Consumption Meter for Sensor Networks supporting Extreme Dynamic Range. Proceedings of the 11th Workshop onWireless Network Testbeds, Experimental Evaluation & CHaracterization, Snowbird, UT, USA."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Persia, S., Carciofi, C., and Faccioli, M. (2017, January 20\u201322). NB-IoT and LoRA connectivity analysis for M2M\/IoT smart grids applications. Proceedings of the 2017 AEIT International Annual Conference, Cagliari, Italy.","DOI":"10.23919\/AEIT.2017.8240558"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"4","DOI":"10.4258\/hir.2017.23.1.4","article-title":"Wearable devices in medical internet of things: Scientific research and commercially available devices","volume":"23","author":"Haghi","year":"2017","journal-title":"Healthc. Inform. Res."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Petri\u0107, T., Goessens, M., Nuaymi, L., Toutain, L., and Pelov, A. (2016, January 4\u20137). Measurements, performance and analysis of LoRa FABIAN, a real-world implementation of LPWAN. Proceedings of the 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Valencia, Spain.","DOI":"10.1109\/PIMRC.2016.7794569"},{"key":"ref_33","first-page":"16","article-title":"Known and unknown facts of LoRa: Experiences from a large-scale measurement study","volume":"15","author":"Liando","year":"2019","journal-title":"ACM Trans. Sens. Netw. (TOSN)"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Parri, L., Parrino, S., Peruzzi, G., and Pozzebon, A. (2019). Low Power Wide Area Networks (LPWAN) at Sea: Performance Analysis of Offshore Data Transmission by Means of LoRaWAN Connectivity for Marine Monitoring Applications. Sensors, 19.","DOI":"10.3390\/s19143239"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Jovalekic, N., Drndarevic, V., Pietrosemoli, E., Darby, I., and Zennaro, M. (2018). Experimental study of LoRa transmission over seawater. Sensors, 18.","DOI":"10.3390\/s18092853"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Li, L., Ren, J., and Zhu, Q. (2017, January 21\u201324). On the application of LoRa LPWAN technology in Sailing Monitoring System. Proceedings of the 2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS), Jackson Hole, WY, USA.","DOI":"10.1109\/WONS.2017.7888762"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Agbuya, F., Apolinario, G.F., Ramos, D.M., Villanueva, J.M., Zafe, P., Hernandez, J.A., and Coquia, J. (2018, January 28\u201331). Design of a Real\u2013Time Ocean Data\u2013Logging Drifter Thru CLOUD Technology for Collecting Tidal Parameters. Proceedings of the TENCON 2018-2018 IEEE Region 10 Conference, Jeju Island, Korea.","DOI":"10.1109\/TENCON.2018.8650270"},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Aref, M., and Sikora, A. (2014, January 11\u201312). Free space range measurements with Semtech Lora\u2122 technology. Proceedings of the 2014 2nd International Symposium on Wireless Systems within the Conferences on Intelligent Data Acquisition and Advanced Computing Systems, Offenburg, Germany.","DOI":"10.1109\/IDAACS-SWS.2014.6954616"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1109\/MCOM.2017.1600613","article-title":"Understanding the limits of LoRaWAN","volume":"55","author":"Adelantado","year":"2017","journal-title":"IEEE Commun. Mag."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Peng, Y., Shangguan, L., Hu, Y., Qian, Y., Lin, X., Chen, X., Fang, D., and Jamieson, K. (2018, January 20\u201325). PLoRa: A passive long-range data network from ambient LoRa transmissions. Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication, Budapest, Hungary.","DOI":"10.1145\/3230543.3230567"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1109\/MCOM.2008.4427233","article-title":"Forward error correction strategies for media streaming over wireless networks","volume":"46","author":"Nafaa","year":"2008","journal-title":"IEEE Commun. Mag."},{"key":"ref_42","unstructured":"Sornin, N., Luis, M., Eirich, T., Kramp, T., and Hersent, O. (2015). Lorawan Specification, LoRa Alliance."},{"key":"ref_43","unstructured":"Bertoldo, S., Paredes, M., Carosso, L., Allegretti, M., and Savi, P. (April, January 31). Empirical indoor propagation models for LoRa radio link in an office environment. Proceedings of the 2019 13th European Conference on Antennas and Propagation (EuCAP), Piscataway, NJ, USA."},{"key":"ref_44","unstructured":"Blenn, N., and Kuipers, F. (2017). LoRaWAN in the wild: Measurements from the things network. arXiv."},{"key":"ref_45","unstructured":"Lee, D.J.Y., and Lee, W.C.Y. (2000, January 18\u201321). Fine tune Lee model. Proceedings of the 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC 2000), Proceedings (Cat. No. 00TH8525), London, UK."},{"key":"ref_46","first-page":"55","article-title":"Analyses and optimization of Lee propagation model for LoRa 868 MHz network deployments in urban areas","volume":"7","year":"2017","journal-title":"J. Eng. Manag. Compet. (JEMC)"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"2022","DOI":"10.1080\/09205071.2019.1661287","article-title":"Propagation measurements for a LoRa network in an urban environment","volume":"33","author":"Paredes","year":"2019","journal-title":"J. Electromagn. Waves Appl."},{"key":"ref_48","unstructured":"Molisch, A.F. (2012). Wireless Communications, John Wiley & Sons."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Salous, S. (2013). Radio Propagation Measurement and Channel Modelling, John Wiley & Sons.","DOI":"10.1002\/9781118502280"},{"key":"ref_50","unstructured":"Casimiro, A., Cecilio, J., Ferreira, P.M., Oliveira, A., Freire, P., Rodrigues, M., and Almeida, L. (2019). AQUAMON\u2014A Dependable Monitoring Platform based on Wireless Sensor Networks for Water Environments, Springer. Safecomp 2019 Fast Abstracts."},{"key":"ref_51","unstructured":"Standard, E. (2016). Short Range Devices (SRD) Operating in the Frequency Range 25 MHz to 1000 MHz, ETSI EN. Part 1: Technical characteristics and methods of measurement."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"208","DOI":"10.1109\/LAWP.2012.2187270","article-title":"Analysis of the relation between Fresnel zone and path loss exponent based on two-ray model","volume":"11","author":"He","year":"2012","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Green, D.B., and Obaidat, A. (May, January 28). An accurate line of sight propagation performance model for ad-hoc 802.11 wireless LAN (WLAN) devices. Proceedings of the 2002 IEEE International Conference on Communications. Conference Proceedings ICC 2002 (Cat. No. 02CH37333), Athens, Greece.","DOI":"10.1109\/ICC.2002.997466"},{"key":"ref_54","unstructured":"(2020, January 20). Atmel 42181 SAM D21. Available online: https:\/\/cdn.sparkfun.com\/datasheets\/Dev\/Arduino\/Boards\/Atmel-42181-SAM-D21_Datasheet.pdf."},{"key":"ref_55","unstructured":"(2020, January 20). Raspberry Pi 3 B+ Power Consumption. Available online: https:\/\/www.pidramble.com\/wiki\/benchmarks\/power-consumption."},{"key":"ref_56","unstructured":"(2020, January 20). Raspberry Pi 3 B+. Available online: https:\/\/www.raspberrypi.org\/documentation\/hardware\/computemodule\/datasheets\/rpi_DATA_CM3plus_1p0.pdf."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"269","DOI":"10.1016\/j.inffus.2019.09.002","article-title":"An overview of data fusion techniques for Internet of Things enabled physical activity recognition and measure","volume":"55","author":"Qi","year":"2020","journal-title":"Inf. Fus."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"778","DOI":"10.1016\/j.procs.2015.09.023","article-title":"Data mining and fusion techniques for WSNs as a source of the big data","volume":"65","author":"Fouad","year":"2015","journal-title":"Procedia Comput. Sci."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/14\/4034\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:50:06Z","timestamp":1760176206000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/20\/14\/4034"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,7,20]]},"references-count":58,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2020,7]]}},"alternative-id":["s20144034"],"URL":"https:\/\/doi.org\/10.3390\/s20144034","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,7,20]]}}}