The “Colours of the continental waters SEC” Scientific Expertise Centre brings together teams from GET, IGEGeosciences Rennes and UMR Epoc that work on the concentration of suspended matter and concentration of chlorophyll a for the surface waters of rivers, lakes and estuaries.

The users of these data are the HYBAM and AMMA-CATCH, the Magest Observation Network, the Rhone Basin Long Term Environmental Research Observatory, the Rhone Sediment Observatory, the French Guiana Water Office , the Brazil Water Agency, the Asian Water Research Centre and the National Meteorology and Hydrology Service of Peru.

The product resulting from the Colours of the continental waters SEC is updated with a frequency of one to 10 days. It has a scale from 10 m to 500 m and covers the Occitanie, Nouvelle-Aquitaine, Normandie, Auvergne-Rhône-Alpes regions and French Guiana.

The data used are high-resolution (Landsat 8, Sentinel 2, SPOT 5 Take5, Venμs) and medium-resolution data (MERIS FR, Sentinel 3).


  • 2015: pre-operational demonstrator  (Brazil Water Agency)
  • 2015 -2017: monitoring of five sites in France and 10 abroad (South America, Africa and Asia)
  • 2017 – 2018: testing and validation of new regional algorithms


Jean-Michel Martinez
IRD, laboratoire GET (Brésil)