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Turbidity and suspended sediment concentration profiles measured monthly or bi-weekly in the Zeeschelde at 16 stations using an OBS instrument
Citation
Horemans, D. M. L.; Maris, T.; Claus, J.; Meire, P.; Ecosystem Management Research Group - Uantwerpen ; International Marine and Dredging Consultants nv.; De Vlaamse Waterweg; Belgium; (2020): Turbidity and suspended sediment concentration profiles measured monthly or bi-weekly in the Zeeschelde at 16 stations using an OBS instrument.
Contact: Horemans, Dante ; Maris, Tom

Archived data
Availability: The data can be made available upon request, please use contact information.

Description
Turbidity and suspended sediment concentration profiles measured monthly (and bi-monthly in summer) in the Zeeschelde at 16 stations, independently of the tidal phase and spring/neap cycle using an OBS instrument. more

Turbidity profiles were obtained using conductivity-temperature-depth (CTD) and turbidity casts from aboard a ship at 16 fixed locations spread over the Belgian part of the Scheldt estuary during monthly or bi-weekly campaigns. Th e campaigns were conducted independently of the tidal phase and spring neap tide. Turbidity was measured at various depths using an Optical Backscatter point Sensor (OBS) of RBR type XR420 CTD+. During each campaign, the sensor was calibrated using a Formazine solution standard. The water body was vertically profiled using a minimal sampling frequency of 0.1 1/s. Simultaneously, two water samples were collected at each location using a Niskin bottle at approximately half the water depth and the water surface. SPM concentrations were gravimetrically determined after filtration in the laboratory. During each campaign, 16x2 SPM water samples were collected, resulting in 32 SPM estimates. To translate turbidity to SPM, we used these 32 samples to apply a linear data fit. We assumed that the relation between turbidity and SPM is location (and time) independent, i.e., equal for every location within one campaign. Calibration of turbidity to SPM resulted in a depth-profile of SPM at 16 fixed locations in the Flemish part of the Scheldt estuary.

Scope
Themes:
Geology - Geophysics - Sedimentation
Keywords:
Marine, Fresh water, Brackish water, Terrestrial, Electrical conductivity, Salinity, Suspended particulate matter, Temperature, Turbidity, Belgium, Zeeschelde

Geographical coverage
Belgium, Zeeschelde [Marine Regions]

Temporal coverage
19 January 2015 - 16 January 2019
Two-weekly

Parameters
Conductivity, Salinity, Suspended sediment concentration, Temperature, Turbidity Methodology
Turbidity: Optical Backscatter Sensor (OBS)

Contributors
Universiteit Antwerpen; Faculteit Wetenschappen; Departement Biologie; Onderzoeksgroep Ecosysteembeheer (ECOBE), moredata creator

Project
OMES 5 Main: Onderzoek naar de gevolgen van het Sigmaplan, baggeractiviteiten en havenuitbreiding in de Zeeschelde op het milieu, more

Dataset status: Completed
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2020-02-13
Information last updated: 2020-02-17
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