Field Methods for Water Quality Surveying, Volume II

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 826

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Guest Editor
School of Engineering, Newcastle University, Newcastle, UK
Interests: environmental engineering; environmental chemistry; environmental pollution risk assessment and remediation; water quality and public health”
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Special Issue Information

Dear Colleagues,

There has been tremendous progress in the development of field methods for water quality surveying, from portable next-generation sequencing devices for on-site characterization of water microbiomes to novel sensors used for real-time monitoring of waterborne hazards. These methods facilitate water quality monitoring in treatment works and remote locations, avoid sample alteration during transportation and storage, and enable rapid data exploitation, allowing immediate decision making. Miniaturized equipment items allow cutting-edge water quality monitoring in low-resource settings, “where there is no laboratory”. Robust field kits for water quality assessments help citizen scientists participate in environmental research. Rapid and online water quality sensors provide enormous water quality datasets with unprecedented spatiotemporal resolution at the catchment scale. This rapid technological development provides new scientific challenges in analytical quality control and assurance, big data management, and interpretation for decision making.

For this Special Issue, we are seeking contributions that report the latest advancements in the state of the art of field-deployable methods for water quality surveying: exemplary field studies, method validations, digital applications for field data collection, transmission, management, and sharing, as well as novel water sensor developments and their applications. Above all, we welcome research which aligns with the our motto: out of the lab, into the field!

Prof. Dr. David Werner
Guest Editor

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Keywords

  • portable devices for water quality testing
  • mobile water quality laboratories
  • novel sensors for online water quality monitoring
  • case studies of on-site and in- situ water quality surveys
  • intelligent water quality sensing and communications
  • digital applications to support field data collection, management and sharing
  • citizen science for water quality
  • point-of-use water sensors

Published Papers (1 paper)

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Research

22 pages, 7215 KiB  
Article
Can Short-Term Online-Monitoring Improve the Current WFD Water Quality Assessment Regime? Systematic Resampling of High-Resolution Data from Four Saxon Catchments
by Jakob Benisch, Björn Helm, Xin Chang and Peter Krebs
Water 2024, 16(6), 889; https://doi.org/10.3390/w16060889 - 20 Mar 2024
Viewed by 556
Abstract
The European Union Water Framework Directive (2000/60/EC; WFD) aims to achieve a good ecological and chemical status of all bodies of surface water by 2027. The development of integrated guidance on surface water chemical monitoring (e.g., WFD Guidance Document No. 7/19) has been [...] Read more.
The European Union Water Framework Directive (2000/60/EC; WFD) aims to achieve a good ecological and chemical status of all bodies of surface water by 2027. The development of integrated guidance on surface water chemical monitoring (e.g., WFD Guidance Document No. 7/19) has been transferred into national German law (Ordinance for the Protection of Surface Waters, OGewV). For the majority of compounds, this act requires monthly sampling to assess the chemical quality status of a body of surface water. To evaluate the representativeness of the sampling strategy under the OGewV, high-frequency online monitoring data are investigated under different sampling scenarios and compared with current, monthly grab sampling data. About 23 million data points were analyzed for this study. Three chemical parameters (dissolved oxygen, nitrate-nitrogen, and chloride concentration) and discharge data were selected from four catchments of different sizes, ranging from 51,391 km2 to 84 km2 (Elbe, Vereinigte Mulde, Neiße and two stations at Lockwitzbach). In this paper, we propose short-term online-monitoring (STOM) as a sampling alternative. STOM considers the placement of online sensors over a limited duration and return interval. In general, we: (I) compare the results of conventional grab sampling with STOM, (II) investigate the different performance of STOM and grab sampling using discharge data as a proxy for analyzing event-mobilized pollutants, and (III) investigate the related uncertainties and costs of both sampling methods. Results show that STOM outperforms grab sampling for parameters where minimum/maximum concentrations are required by law, as the probability of catching a single extreme value is higher with STOM. Furthermore, parameters showing a pronounced diurnal pattern, such as dissolved oxygen, are also captured considerably better. The performance of STOM showed no substantial improvements for parameters with small concentration variability, such as nitrogen-nitrate or chloride. The analysis of discharge events as a proxy parameter for event-mobilized pollutants proves that the probability of capturing samples during events is significantly increased by STOM. Full article
(This article belongs to the Special Issue Field Methods for Water Quality Surveying, Volume II)
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