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In situ high frequency long term measurements of suspended sediment concentration in turbid estuarine system (Seine Estuary, France): Optical turbidity sensors response to suspended sediment characteristics

1. Introduction
2. Study area field measurements
2.1. Regional settings
2.2. Long-term automated monitoring network
2.3. Measurements protocol at the tidal scale
3. Material and methods
3.1. Measuring instruments
3.2. Sensor metrological quality
3.3. Calculation of distribution average dry density
3.4. Optical sensor calibration method
3.5. Uncertainty quantification
4. Results
4.1. Relationship between SPM concentration and turbidity signal
4.2. Effect of SPM properties on optical sensor output
5. Discussion
5.1. Turbidity sensors and IOPs of natural SPM
5.2. Automated monitoring network calibration
6. Conclusions
Acknowledgements
References