Title: Copernicus Sentinel-2 captures flooding of wetlands in the Laguna of Venice
Copernicus Sentinel-2 data of 26 October 2019 and 10 November show the flooding of wetlands in the Laguna of Venice and indicate thus the rising water levels that also flooded large parts of Venice itself. On the left side, the situation is shown as false-colour infrared images where vegetation appears read. On the right side, a water index computed from Sentinel-2 bands shows water in blue.
Water reflects particularly blue and green parts of the sunlight, whereas infrared gets absorbed. As a result, water appears very dark in the Sentinel-2 infrared bands, while it appears brighter in the visible bands. This spectral difference for water is rather unique, and calculating the difference between a visible band and an infrared band over the entire image thus enables to generate a map of where open water is found in the scene.
Copyright: Contains modified Copernicus Sentinel data (2019)/processed by the Department of Geosciences, University of Oslo. The Copernicus Sentinel-2 water index was extracted from the Sentinel Hub EO Browser.