Use case: environment
Monitoring habitats and water quality
Satellite data shows how habitats change and how clear and nutrient-rich lakes are. Land cover maps record grassland, wetland and woodland in protected areas and how they change between mapping years. For selected lakes, Copernicus publishes turbidity, chlorophyll and a trophic state index every ten days. Species records and samples from small waters still need fieldwork.
- Reference
- UC-28
- Technologies
- Challenge
- Land use and vegetation
- Updated
- Published by
- LETO SPACE
01Technology
How it works
Satellites do not see species. They see the land cover that habitats depend on, and the colour of the water that reveals what it carries.
EUSPA describes Earth observation as a source of the parameters needed to assess the condition and the equilibrium of water ecosystems, and as a way to monitor ecosystem conditions such as water quality and soil health Source: EU Agency for the Space Programme (EUSPA), 26 May 2026EU Agency for the Space Programme (EUSPA)EU Space Market Report 2026, Issue 126 May 2026Open source (opens euspa.europa.eu).
Habitats. Land cover maps record which areas are grassland, wetland, woodland or farmland, and repeated maps show where that changes. The Copernicus N2K product, made from very high resolution satellite data, maps land cover and land use in 55 classes for 4,790 grassland-rich Natura 2000 sites and a 2 km buffer around each, for the reference years 2006, 2012 and 2018. It lets users monitor the status of these sites and how they change over time Source: Copernicus Land Monitoring Service, accessed 7 October 2026Copernicus Land Monitoring ServiceNatura 2000 (N2K) / Protected Areas Land Cover/Land Use (product page)accessed 7 October 2026Open source (opens land.copernicus.eu). Optical satellites such as Sentinel-2 add frequent images with bands designed for vegetation Source: European Space Agency (ESA), SentiWiki, accessed 6 October 2026European Space Agency (ESA), SentiWikiSentinel-2 missionaccessed 6 October 2026Open source (opens sentiwiki.copernicus.eu).
Water quality. Algae and suspended sediment change the light that leaves the water. Optical satellites measure this water-leaving light, and algorithms turn it into parameters such as turbidity and chlorophyll-a Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu). ESA lists the quality and level of water in reservoirs and rivers among the uses of satellite data Source: European Space Agency (ESA), ESA Space Solutions, accessed 6 October 2026European Space Agency (ESA), ESA Space SolutionsESA Space Solutions: Space for the bioeconomyaccessed 6 October 2026Open source (opens business.esa.int).
For wildlife, satellite positioning adds the movements of tagged animals: GNSS supports the tracking of threatened species Source: EU Agency for the Space Programme (EUSPA), 26 May 2026EU Agency for the Space Programme (EUSPA)EU Space Market Report 2026, Issue 126 May 2026Open source (opens euspa.europa.eu).
02Data
Which data and satellites
| Question | Data | Example |
|---|---|---|
| Is a protected habitat shrinking or changing? | Land cover maps of several years | Copernicus N2K, 2006, 2012 and 2018 |
| How turbid is a lake? | Turbidity and suspended matter | Copernicus Lake Water Quality, from Sentinel-3 |
| Is a lake rich in nutrients, or is an algal bloom forming? | Chlorophyll-a, trophic state index, cyanobacteria index | Copernicus Lake Water Quality, from Sentinel-3 |
| Where do tagged animals move? | GNSS positions | Tracking collars and tags |
The Copernicus lake products cover more than 4,200 inland water bodies that are among the largest in the world or of specific monitoring interest, mostly natural lakes but also reservoirs, lagoons and wide river sections. Values are published for 10-day periods on a grid of about 300 m Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu).
- lowerhigherChlorophyll-a, illustrative values
- Shore buffermask for lake averages
- One cell: about 300 mone value per 10-day period
- Small lake: not resolved
- Narrow river: not resolved
03Deliverables
What you get
- Land cover and change maps of protected sites and their surroundings Source: Copernicus Land Monitoring Service, accessed 7 October 2026Copernicus Land Monitoring ServiceNatura 2000 (N2K) / Protected Areas Land Cover/Land Use (product page)accessed 7 October 2026Open source (opens land.copernicus.eu).
- Time series of turbidity, chlorophyll-a and trophic state for each covered lake, every ten days Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu).
- A floating cyanobacteria index, which points to blooms at the water surface Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu).
- Places to check in the field, where the data shows an imbalance in an ecosystem parameter Source: EU Agency for the Space Programme (EUSPA), 26 May 2026EU Agency for the Space Programme (EUSPA)EU Space Market Report 2026, Issue 126 May 2026Open source (opens euspa.europa.eu).
04Limits
Limits
Limit 01
Small lakes and shorelines
At about 300 m per grid cell, small water bodies and narrow rivers are not resolved, and only the selected water bodies are covered. For Europe and Africa, a version on a 100 m grid based on Sentinel-2 provides data from 2024 onwards Source: Copernicus Land Monitoring Service, accessed 8 October 2026Copernicus Land Monitoring ServiceLake Water Quality 2024-present (raster 100 m), global, 10-daily, version 2accessed 8 October 2026Open source (opens land.copernicus.eu). Near shorelines the retrieval is hard to control, so the product manual advises users interested in lake averages to mask a buffer from the shore Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu).
Limit 02
Cloud, haze and ice
The retrieval may fail at cloud borders, under thin cloud or on lake ice, and observations near land under haze are less reliable. For highly turbid lakes, version 2.0.0 of the product underestimates the water's reflectance Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu).
Limit 03
Habitat maps are snapshots
The N2K maps exist for the reference years 2006, 2012 and 2018 Source: Copernicus Land Monitoring Service, accessed 7 October 2026Copernicus Land Monitoring ServiceNatura 2000 (N2K) / Protected Areas Land Cover/Land Use (product page)accessed 7 October 2026Open source (opens land.copernicus.eu). They show the trend between those years, not this season's state, and they do not replace surveys of species on site Source: EU Agency for the Space Programme (EUSPA), 26 May 2026EU Agency for the Space Programme (EUSPA)EU Space Market Report 2026, Issue 126 May 2026Open source (opens euspa.europa.eu).
05Next steps
How we help
Some indicators in environmental reporting may already be covered, in part, by free Copernicus products such as those above. In a strategy engagement we check which of your indicators satellite data can support, which product covers your sites and waters, and where a dedicated service or fieldwork is needed. We then write the requirements for choosing a provider.
More on requirements and procurement
To see who offers such services, use Spacegraph, our discovery platform. Its marketplace has use-case categories for biodiversity and ecosystems and for water resource monitoring.
06Use cases
Related use cases
- Monitoring forest health and deforestationDamage, stress and clearings in forests.
- Monitoring air qualityWhat satellites measure in the air above a region.
- Crop monitoring and precision farmingVegetation data on farmland next to protected sites.
Frequently asked questions
Q1Which satellite data is available on water quality, and how often is it updated?
The Copernicus Land Monitoring Service publishes lake water quality for more than 4,200 inland water bodies worldwide: turbidity, suspended matter, chlorophyll-a, a floating cyanobacteria index and a trophic state index. The values are delivered for 10-day periods on a grid of about 300 m, based on Sentinel-3 in near real time Source: Copernicus Land Monitoring Service, 24 July 2024Copernicus Land Monitoring ServiceProduct User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01)24 July 2024Open source (opens land.copernicus.eu). Like all Copernicus data, they are free of charge Source: European Union, EUR-Lex, 12 May 2021European Union, EUR-LexRegulation (EU) 2021/696 of 28 April 2021 establishing the Union Space Programme and the European Union Agency for the Space Programme12 May 2021Open source (opens eur-lex.europa.eu).
Q2Can satellite data replace biodiversity surveys?
No. According to EUSPA, biodiversity monitoring still relies heavily on observations on site, and Earth observation is increasingly used to assess ecosystem conditions, habitat change, water quality and soil health at scale Source: EU Agency for the Space Programme (EUSPA), 26 May 2026EU Agency for the Space Programme (EUSPA)EU Space Market Report 2026, Issue 126 May 2026Open source (opens euspa.europa.eu). Satellite data shows where habitats change and where a closer look is needed; it does not count species.
Q3How do we start a pilot for habitat or water monitoring?
Start with the sites or water bodies you are responsible for and the indicator you already report, for example the extent of a habitat type or the trophic state of a lake. Then check whether a Copernicus product covers it or whether a dedicated service is needed.
Sources (7)
- EU Space Market Report 2026, Issue 1 (opens euspa.europa.eu)
- Natura 2000 (N2K) / Protected Areas Land Cover/Land Use (product page) (opens land.copernicus.eu)
- Product User Manual: Lake Waters 300 m product, version 2.0.0 (Copernicus Global Land Operations, issue I1.01) (opens land.copernicus.eu)
- Lake Water Quality 2024-present (raster 100 m), global, 10-daily, version 2 (opens land.copernicus.eu)
- ESA Space Solutions: Space for the bioeconomy (opens business.esa.int)
- Sentinel-2 mission (opens sentiwiki.copernicus.eu)
- Regulation (EU) 2021/696 of 28 April 2021 establishing the Union Space Programme and the European Union Agency for the Space Programme (opens eur-lex.europa.eu)
Contact
Which protected sites or waters do you report on? Start with the indicators the report requires.
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