A Low-Cost Continuous Turbidity Monitor

Gillett, David; Marchiori, Alan

doi:10.3390/s19143039

Cited by 47 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several novel turbidity sensors have been documented in peer-reviewed literature. Gillett 38 investigated the use of low-cost, commercially-available appliance turbidity sensors (such as those found in washing machines and dishwashers). These sensors work on the principle of light attenuation, where the light detector is placed 180 o from the incident light.…”

Section: State-of-the-art In Low-cost Turbidity Sensingmentioning

confidence: 99%

Open-Source, Low-Cost, In-Situ Turbidity Sensor for River Network Monitoring

Droujko

Molnár

2021

Preprint

View full text Add to dashboard Cite

Fine sediment transport in rivers is important for catchment nutrient fluxes, global biogeochemical cycles, water quality and pollution in riverine, coastal and marine ecosystems. Monitoring of suspended sediment in rivers with current sensors is challenging and expensive and most monitoring setups are restricted to few single site measurements. To better understand the spatial heterogeneity of fine sediment sources and transport in river networks there is a need for new smart water turbidity sensing that is multi-site, accurate and affordable. In this work, we have created such a sensor, which detects scattered light from an LED source using two detectors in a control volume, and can be placed in a river. We compare several replicates of our sensor to different commercial turbidity probes in a mixing tank experiment using two sediment types over a wide range of typical concentrations observed in rivers. Our results show that we can achieve precise and reproducible turbidity measurements in the 0-4000 NTU or 0-16g/L range. Our sensor can also be used directly as a suspended sediment sensor and bypass an unnecessary calibration to Formazin. The developed turbidity sensor is much cheaper than existing options of comparable quality and is especially intended for distributed sensing across river networks.

show abstract

Section: State-of-the-art In Low-cost Turbidity Sensingmentioning

confidence: 99%

Open-Source, Low-Cost, In-Situ Turbidity Sensor for River Network Monitoring

Droujko

Molnár

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…For such applications, distributed wireless sensor networks are required to monitor the parameters over a larger area and send the data monitored to a centralized controller using wireless communication. Such applications normally monitor parameters such as chlorophyll [9], dissolved oxygen concentration [14][15] [16], turbidity [17], PH [18] and temperature [19].…”

Section: Literature Reviewmentioning

confidence: 99%

IoT for Monitoring and Control of Water Quality Parameters

Lezzar¹,

Benmerzoug²,

Kitouni

2020

Int. J. Interact. Mob. Technol.

View full text Add to dashboard Cite

<p class="0abstract"><span lang="EN-US">This work presents an Internet of Things (IoT) solution to facilitate real time water quality monitoring by enabling the management of collected data from electronic sensors. Firstly, we present in detail problems encountered during the used data collection process. We discuss after the requirements from the water monitoring quality standpoint, data acquisition, cloud processing and data visualization to the end user. We designed a solution to minimize technicians’ visits to isolated water tower, we designed sensors achieving a lifespan of several years. The solution will be capable of scaling the processing and storage resources. This combination of technologies can cope with different types of environments. The system also provides a notification to a remote user, when there is a non-conformity of water quality parameters with the pre-defined set of standard values.</span></p>

show abstract

“…At present, different sensors mounted on different platforms (e.g., fluorimeters mounted on buoys) or on probes (e.g., CTD -conductivity, temperature, and depth) are used to provide continuous real-time information on water quality parameters (e.g., [24][25][26]). In addition, in recent years, different studies showed the possibility to use in situ radiometric sensors to characterize water quality status and its temporal variability by means of continuous measurements (e.g., [27,28]).…”

Section: Introductionmentioning

confidence: 99%

Detecting Climate Driven Changes in Chlorophyll-a Using High Frequency Monitoring: The Impact of the 2019 European Heatwave in Three Contrasting Aquatic Systems

Free

Bresciani

Pinardi

et al. 2021

Sensors

View full text Add to dashboard Cite

The frequency of heatwave events in Europe is increasing as a result of climate change. This can have implications for the water quality and ecological functioning of aquatic systems. We deployed three spectroradiometer WISPstations at three sites in Europe (Italy, Estonia, and Lithuania/Russia) to measure chlorophyll-a at high frequency. A heatwave in July 2019 occurred with record daily maximum temperatures over 40 °C in parts of Europe. The effects of the resulting storm that ended the heatwave were more discernable than the heatwave itself. Following the storm, chlorophyll-a concentrations increased markedly in two of the lakes and remained high for the duration of the summer while at one site concentrations increased linearly. Heatwaves and subsequent storms appeared to play an important role in structuring the phenology of the primary producers, with wider implications for lake functioning. Chlorophyll-a peaked in early September, after which a wind event dissipated concentrations until calmer conditions returned. Synoptic coordinated high frequency monitoring needs to be advanced in Europe as part of water management policy and to improve knowledge on the implications of climate change. Lakes, as dynamic ecosystems with fast moving species-succession, provide a prism to observe the scale of future change.

show abstract

A Low-Cost Continuous Turbidity Monitor

Cited by 47 publications

References 14 publications

Open-Source, Low-Cost, In-Situ Turbidity Sensor for River Network Monitoring

Open-Source, Low-Cost, In-Situ Turbidity Sensor for River Network Monitoring

IoT for Monitoring and Control of Water Quality Parameters

Detecting Climate Driven Changes in Chlorophyll-a Using High Frequency Monitoring: The Impact of the 2019 European Heatwave in Three Contrasting Aquatic Systems

Contact Info

Product

Resources

About