BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Tidal variability of water quality parameters in a mesotidal estuary (Sado Estuary, Portugal)

Participants in the publication
Ângela Nascimento (Author)
Beatriz Biguino (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
MARE
Carlos Borges (Author)
Rui Cereja (Author)
Joana P. C. Cruz (Author)
Fátima Sousa (Author)
Dep. Engenharia Geográfica, Geofísica e Energia
MARE
Joaquim Dias (Author)
Dep. Engenharia Geográfica, Geofísica e Energia
MARE
Vanda Brotas (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Dep. Biologia Vegetal
MARE
Carla Palma (Author)
Ana C. Brito (Author)

Summary
To establish effective water quality monitoring strategies in estuaries, it is imperative to identify\\\\\\\\nand understand the main drivers for the variation of water quality parameters. The tidal effect is an important factor of the daily and fortnightly variability in several estuaries. However, the extent\\\\\\\\nof that influence on the different physicochemical and biological parameters is still overlooked in some estuarine systems, such as the Sado Estuary, a mesotidal estuary located on the west coast\\\\\\\\nof Portugal. The main objective of this study was to determine how the water quality parameters\\\\\\\\nof the Sado Estuary varied with the fortnightly and the semidiurnal tidal variation. To achieve this goal, sampling campaigns were conducted in May/18, Nov/18 and Jun/19, under neap and spring\\\\\\\\ntidal conditions, with data collection over the tidal cycle. Results were observed to be significantly influenced by the tidal variation, in a large area of the estuary. Flood seemed to mitigate possible effects of nutrient enrichment in the water column. Additionally, significant differences were also observed when considering the different sampling stations. Temperature, Suspended Particulate Matter (SPM) and nutrients showed the highest values at low water. Lastly, the implications of the tidal variability in the evaluation of the water quality according to Water Framework Directive were also discussed, highlighting the importance of studying short-time scale variations and the worst-case scenario to ensure water quality is maintained. These findings are relevant for the implementation of regional management plans and to promote sustainable development.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Scientific Reports

Publication Identifiers
ISSN - 2045-2322

Publisher
Springer Science and Business Media LLC


Document Identifiers
DOI - https://doi.org/10.1038/s41598-021-02603-6
URL - http://dx.doi.org/10.1038/s41598-021-02603-6

Rankings
SCIMAGO Q1 (2020) - 1.240 - Multidsiciplinary
Web Of Science Q1 (2020) - 4.38 - MULTIDISCIPLINARY SCIENCES - SCIE

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