Perspectives on user engagement of satellite Earth observation for water quality management

Agnoli, Lara; Urquhart, Erin; Georgantzı́s, Nikolaos; Schaeffer, Blake A.; Simmons, Richard; Hoque, Bilqis A.; Neely, Merrie Beth; Neil, Claire; Oliver, J; Tyler, Andrew N.

doi:10.1016/j.techfore.2023.122357

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…Water and soil are among the most important components for life and prosperity on our planet. However, the many competing pressures on the ecosystem services of water and soil are increasingly unsustainable, and climate change is exacerbating these pressures [60]. All over the world, environmental policy suffers from a lack of data to make targeted and efficient decisions.…”

Section: Discussionmentioning

confidence: 99%

Integrating Earth Observation with Stream Health and Agricultural Activity

Chatzidavid,

Kokinou,

Kokolakis

et al. 2023

Remote Sensing

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The overall health of streams, including their surrounding urban or agricultural areas, is inextricably linked to general ecological balance and public health (physical and mental well-being). This study aims to contribute to the monitoring of rural or suburban areas adjacent to streams. Specifically, low-cost and rapid ground and Earth observation techniques were used to (a) obtain a rapid assessment of stream soil and water patterns, (b) create a database of selected parameters for the study area that can be used for future comparisons, and (c) identify soil variability in agricultural fields adjacent to streams and determine soil zones that will enable the rational use of inputs (water, fertilisers, and pesticides). Robust techniques from related fields of topography, geology, geophysics, and remote sensing were combined using GIS for two selected areas (I and II) in Heraklion, central Crete (Greece) in the eastern Mediterranean. Our results indicate that area I (east of Heraklion) is under pressure only in its coastal part, most probably due to urbanisation (land change). The agricultural fields of area II (west of Heraklion) show normal values for the distribution of electrical conductivity and magnetic susceptibility and present spatial variability indicating intra-parcel zones. Intra-parcel variability of the conductivity and magnetic susceptibility should be considered in future cropping and environmental management.

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Section: Discussionmentioning

confidence: 99%

Integrating Earth Observation with Stream Health and Agricultural Activity

Chatzidavid,

Kokinou,

Kokolakis

et al. 2023

Remote Sensing

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“…This selection of studies illustrates the increasing possibilities of using and applying optical sensors on various platforms to manage water resources at different scales. While problems with data accessibility and interoperability remain (e.g., Agnoli et al, 2023), some studies have successfully combined data from other satellite platforms (e.g., Zhao et al, 2020), as well as UAVs and in-situ sensors. Shi et al (2019) highlight the need for automated processing algorithms that can be validated at increasing spatial and temporal resolution.…”

Section: Scaling From In-situ To Large Water Bodiesmentioning

confidence: 99%

In-situ optical water quality monitoring sensors—applications, challenges, and future opportunities

Kumar,

Khamis,

Stevens

et al. 2024

Front. Water

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Water quality issues remain a major cause of global water insecurity, and real-time low-cost monitoring solutions are central to the remediation and management of water pollution. Optical sensors, based on fluorescence, absorbance, scattering and reflectance-based principles, provide effective water quality monitoring (WQM) solutions. However, substantial challenges remain to their wider adoption across scales and environments amid cost and calibration-related concerns. This review discusses the current and future challenges in optical water quality monitoring based on multi-peak fluorescence, full-spectrum absorbance, light-scattering and remotely sensed surface reflectance. We highlight that fluorescence-based sensors can detect relatively low concentrations of aromatic compounds (e.g., proteins and humic acids) and quantify and trace organic pollution (e.g., sewage or industrial effluents). Conversely, absorbance-based sensors (Ultraviolet-Visible-Infra-red, UV-VIS-IR) are suitable for monitoring a wider range of physiochemical variables (e.g., nitrate, dissolved organic carbon and turbidity). Despite being accurate under optimal conditions, measuring fluorescence and absorbance can be demanding in dynamic environments due to ambient temperature and turbidity effects. Scattering-based turbidity sensors provide a detailed understanding of sediment transport and, in conjunction, improve the accuracy of fluorescence and absorbance measurements. Recent advances in micro-sensing components such as mini-spectrometers and light emitting diodes (LEDs), and deep computing provide exciting prospects of in-situ full-spectrum analysis of fluorescence (excitation-emission matrices) and absorbance for improved understanding of interferants to reduce the signal-to-noise ratio, improve detection accuracies of existing pollutants, and enable detection of newer contaminants. We examine the applications combining in-situ spectroscopy and remotely sensed reflectance for scaling Optical WQM in large rivers, lakes and marine bodies to scale from point observations to large water bodies and monitor algal blooms, sediment load, water temperature and oil spills. Lastly, we provide an overview of future applications of optical techniques in detecting emerging contaminants in treated and natural waters. We advocate for greater synergy between industry, academia and public policy for effective pollution control and water management.

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