Medium resolution imaging spectrometer data for monitoring tropical coastal waters: a case study of Berau estuary,East Kalimantan,Indonesia |
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| Authors: | Wiwin Ambarwulan C M Mannaerts H J van der Woerd Mhd S Salama |
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| Institution: | 1. Faculty of Geo-Information Science &2. Earth Observation, University of Twente , The Netherlands;3. National Coordinating Agency for Surveys and Mapping , Cibinong, Indonesia ambarwulan@itc.nl;5. Earth Observation, University of Twente , The Netherlands;6. Institute for Environmental Studies, Free University of Amsterdam , The Netherlands |
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| Abstract: | This article investigates the performance of MERIS reduced resolution data to monitor water quality parameters in the Berau estuary waters, Indonesia. Total suspended matter (TSM), Chlorophyll-a (Chl-a) concentration and diffuse attenuation coefficient (Kd ) were derived from MERIS data using three different algorithms for coastal waters: standard global processor (MERIS L2), C2R and FUB. The outcomes were compared to in situ measurements collected in 2007. MERIS data processed with C2R gave the best retrieval of Chl-a, while MERIS L2 performed the best for TSM retrieval, but large deviations from in situ data were observed, pointing at inversion problems over these tropical waters for all standard processors. Nevertheless, MERIS can be of use for monitoring equatorial coastal waters like the Berau estuary and reef system. Applying a Kd (490) local algorithm to the MERIS RR data over the study area showed a sufficient good correlation to the in situ measurements (R 2 = 0.77). |
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| Keywords: | water quality ocean colour diffuse attenuation coefficient Kalimantan |
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