Long-Term Stability of Low-Cost IoT System for Monitoring Water Quality in Urban Rivers

被引:0
|
作者
Naloufi, Manel [1 ,2 ]
Abreu, Thiago [3 ]
Souihi, Sami [3 ]
Therial, Claire [2 ]
Rodrigues, Natalia Angelotti de Ponte [2 ]
Le Goff, Arthur Guillot [2 ]
Saad, Mohamed [2 ]
Vincon-Leite, Brigitte [2 ]
Dubois, Philippe [2 ]
Delarbre, Marion [1 ]
Kennouche, Paul [1 ]
Lucas, Francoise S. [2 ]
机构
[1] Direct Proprete & Eau Serv Tech Eau & Assainisseme, 27 Rue Commandeur, F-75014 Paris, France
[2] Univ Paris Est Creteil, Ecole Ponts ParisTech, Lab Eau Environm & Syst Urbains Leesu, 61 Ave Gen Gaulle, F-94010 Creteil, France
[3] Univ Paris Est Creteil, Image Signal & Intelligent Syst LiSSi Lab, 122 Rue Paul Armangot, F-94400 Vitry Sur Seine, France
关键词
Arduino sensor; stability; water quality; chemical parameters; urban rivers; OUTLIER DETECTION; DISSOLVED-OXYGEN;
D O I
10.3390/w16121708
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Monitoring water quality in urban rivers is crucial for water resource management since point and non-point source pollution remain a major challenge. However, traditional water quality monitoring methods are costly and limited in frequency and spatial coverage. To optimize the monitoring, techniques such as modeling have been proposed. These methods rely on networks of low-cost multiprobes integrated with IoT networks to offer continuous real-time monitoring, with sufficient spatial coverage. But challenges persist in terms of data quality. Here, we propose a framework to verify the reliability and stability of low-cost sensors, focusing on the implementation of multiparameter probes embedding six sensors. Various tests have been developed to validate these sensors. First of all, a calibration check was carried out, indicating good accuracy. We then analyzed the influence of temperature. This revealed that for the conductivity and the oxygen sensors, a temperature compensation was required, and correction coefficients were identified. Temporal stability was verified in the laboratory and in the field (from 3 h to 3 months), which helped identify the frequency of maintenance procedures. To compensate for the sensor drift, weekly calibration and cleaning were required. This paper also explores the feasibility of LoRa technology for real-time data retrieval. However, with the LoRa gateways tested, the communication distance with the sensing device did not exceed 200 m. Based on these results, we propose a validation method to verify and to assure the performance of the low-cost sensors for water quality monitoring.
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页数:29
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