Details of High frequency monitoring of water quality in the North-Aquitanian estuaries: data from the Portets station


Dataset identification

Title of datasetHigh frequency monitoring of water quality in the North-Aquitanian estuaries: data from the Portets station
Narrative summary of datasetThe French Atlantic coast hosts numerous macrotidal and turbid estuaries that flow into the Bay of Biscay that are natural corridors for migratory fishes. The two best known are those of the Gironde and the Loire. However, there are also a dozen estuaries set geographically among them, of a smaller scale. The physico-chemical quality of estuarine waters is a necessary support element for biological life and determines the distribution of species, on which many ecosystem services (e.g. professional or recreational fishing) depend. With rising temperatures and water levels, declining precipitation and population growth projected for the New Aquitaine region by 2030, the question of how the quality and ecological status of estuarine waters will evolve becomes increasingly critical. The MAGEST (Mesures Automatisées pour l’observation et la Gestion des ESTuaires nord aquitains) high-frequency monitoring of key physico-chemical parameters was first developed in the Gironde estuary in 2004 ; the Seudre and Charente estuaries were instrumented late 2020. First based on real-time automated systems, MAGEST is now equipped by autonomous multiparameter sensors. Depending of the stations, an optode is also deployed to secure dissolved oxygen measurement. By the end of 2020, MAGEST had 12 instrumented sites. Portets is a measuring station located in the upper Gironde estuary (Garonne subestuary, about 20 km upstream of the Bordeaux metropolis. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Start date2019-08-05
End date2020-10-05
Frequency of observationsminute to sub-hour

Responsible organisations

Organisation nameIfremer, Scientific Information Systems for the sea
Role of organisationDataset Holding Organisation
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher
How to citeSchmidt Sabine, The Magest Consortium (2021). High frequency monitoring of water quality in the North-Aquitanian estuaries: data from the Portets station. SEANOE.

Dataset availability

Original dataset download link
Dataset formatDelimited
Public accessNo limitations
License for useCC-BY 4.0
Link to dataset after processing by data


Latitude north boundary46
Longitude east boundary0.2
Latitude south boundary44.6
Longitude west boundary-1.3
Sea areaAtlantic Ocean
Vertical extent minimum0.5 Metres
Vertical extent maximum0.5 Metres

Data types, collection and processing

Observation typeDissolved gases
Water column temperature and salinity
ParameterAlkalinity, acidity and pH of the water column
Date and time
Dissolved oxygen parameters in the water column
Optical backscatter
Temperature of the water column
Instrument typeoptical backscatter sensors
water temperature sensor
salinity sensor
Platform typemooring
Data quality processing informationQuality controlled data

Process information

Submitting organisationOceanic and Continental Environments and Paleoenvironments
Submission identifier (UUID)a53ad03f-3830-8303-3031-000000080130
Date of dataset creation2021-01-01
Date of dataset revision2021-07-01
Date of metadata creation2021-7-3
Date of metadata latest revision2021-07-07
Date of publishing2021-07-29
Date of processed dataset publication2022-10-14
Processing data centreIfremer, Scientific Information Systems for the sea
Summary record-ID832