Products & Services

MedEOS aims to develop and produce high-resolution, gap-free maps of experimental Earth observation water quality products by employing data fusion techniques to combine the high temporal resolution of Sentinel 3 OLCI and high spatial resolution of Sentinel 2 MSI data. Moreover, MedEOS will develop, implement and demonstrate a methodology to produce an extensive tracking of river plumes in Mediterranean coastal waters with the use of EO products. To access MedEOS products and services go to Data Pool.

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Earth Observation Direct Derived Water Quality Products

  • Total Suspended Matter (TSM) is a key element of water quality in coastal areas. It is a well-known parameter in ocean colour applications. A method using a single band, deemed robust for coastal turbid waters, is considered for this project’s application.
  • Turbidity is a water quality parameter closely related to TSM. The Turbidity Product will be designed according to the ISO 7027 definition: a quantitative measurement of “diffuse radiation” expressed in Formazin Nephelometric Units (FNU).
  • Chl-a Concentration is the main pigment in phytoplankton, and a key element in ocean-colour applications. Phytoplankton responsible for primary production through photosynthesis, and an indicator of the natural processes in the water environment.
  • Secchi Depth: The Secchi disk is the oldest instrument used to measure water transparency in the ocean (a disk which is lowered in the water). The Secchi depth is the depth at which the Secchi disk is no longer detectable by a human observer from the water surface.
  • Coloured Dissolved Organic Matter (CDOM) is a key element of water quality in coastal areas, and a well-known parameter in ocean colour applications. Its presence is mostly determined by freshwater outflow, and it can be used as a proxy for dissolved oxygen.

Earth Observation Indirectly Derived Water Quality Products

  • Faecal bacterial contamination indicators: Faecal bacterial contamination of coastal waters depends on continental inputs (e.g. river discharges, sewer system outflows) and on bacteria resilience capacity in the coastal ocean. To provide indicators to monitor the risk of coastal waters contamination, the following EO indirect parameters will be produced:
    • Faecal bacteria Decay Rate (T90)
    • Faecal bacteria Vulnerability Index
    • Local bacterial concentrations
  • Eutrophication indicators: Eutrophication is highly conditioned by nutrient abundance, while Chlorophyll-a (Chl-a) is often the main parameter signaling the occurrence of algal blooms. The following EO indirect parameters will be produced to support the monitoring of eutrophication:
    • Phosphorus and nitrogen concentrations
    • Eutrophication Index.
  • Harmful Algal Blooms: Chlorophyll-a concentration derived from EO datasets and / or eutrophication index will be used to narrow down areas where Harmful Algal Blooms (HABs) could be detected. Spectral indices designed for specific HABs communities will be further used to derive either qualitative or, when possible, quantitative information about the intensity of the bloom. 
  • Global environmental anomaly detection: Based on the multiparameter datasets obtained from both EO direct and indirect products, a global model will be developed to automatically detect anomalies in coastal water quality, which will indicate probable anthropogenic pollution

River Plume Monitoring

  • Rivers are one of the main conveyor of land-based pollutants into nearshore and coastal water. To support the monitoring and assessment of river plume impact on coastal water quality, a river plume monitoring dataset will be produced. The dataset will provide a systematic detection of plumes related to major rivers discharging freshwater into the Mediterranean basin.