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Clear view on a turbid estuary: Assessing the feasibility of an operational service for innovative integrated management of coastal resources.
Poster Title: Clear view on a turbid estuary: Assessing the feasibility of an operational service for innovative integrated management of coastal resources.
Submitted on 07 Nov 2017
Author(s): Lazaros Spaias 1 , Kathrin Poser 1 , Suhyb Salama 2 , Annelies Hommersom 1 , Marnix Laanen 1 , Steef Peters 1
Affiliations: 1Water Insight, 2 ITC-University of Twente
Poster Views: 853
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Poster Information
Abstract: We present a feasibility study for setting up an operational monitoring service for water quality parameters in the Eems-Dollard estuary based on Earth observation. This area is highly dynamic in time and space. This makes it impossible to monitor them efficiently with conventional monitoring methods insufficiently high resolution and frequency. Earth observation may provide a valuable addition to an integrated monitoring system. In this study, low (S3, GHRSST), medium (Sentinel 2, Landsat 8) and high (RapidEye) resolution satellite sensors were used in order to derive relevant parameters for the calculation of primary production for the Eems Dollard region. C2RCC, C2X and Acolite atmospheric corrections were tested. Parameters relevant to water quality and tidal flats were calculated. The validation showed that C2X performed better than Acolite and C2RCC for Sentinel 2 when compared to in-situ reflection measurements. Derived concentrations of SPM and Chl-a correspond to available in-situ measurements and historically-known ranges. This also applies to the derived water temperatures based on satellite measurements. Mapping of benthic biomass and median grain size show good similarities with known patterns. The overall conclusion of the feasibility study is that all offered parameters can be produced with sufficient accuracySummary: Estuarine waters of this area are turbid
and highly dynamic in time and space,
overlooks the fine spatio-temporal scales
of water quality variables. Data from
earth observing satellites are capable of
capturing the spatio-temporal variability
required for an integrated monitoring
References: Brockmann, C., Doerffer, R., Peters, M., Kerstin, S., Embacher, S., Ruescas, A (2016)
Evolution of the C2RCC Neural Network for Sentinel 2 and 3 for the Retrieval of Ocean
Colour Products in Normal and Extreme Optically Complex Waters. Living Planet
Symposium, Proceedings of the conference held 9-13 May 2016 in Prague, Czech
Republic. Edited by L. Ouwehand. ESA-SP Volume 740, ISBN: 978-92-9221-305-3, p.54
Figure 3. Sentinel 2 SPM image from 2017-3-27 using Nechad 705
Gons, H.J., Rijkeboer, M. and Ruddick, K.G. (2005) Effect of a waveband shift on
chlorophyll retrieval from MERIS imagery of inland and coastal waters. J Plankton Res
(2005) 27 (1): 125-127
Conclusions & Future Work
Laws (1997). Mathematical Methods for Oceanographers. John Wiley and Sons, Inc.,
New York, NY.
Nechad, B., Ruddick, K.G. and Park, Y. (2010) Calibration and validation of a generic
multisensor algorithm for mapping of total suspended matter in turbid waters. R
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