Volga River coloured in bright green, Russia

Sentinel-2 MSI acquired on 08 August 2016 at 08:00:12 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Water colour, water quality, pollution, agriculture, river, reservoir lake, dam, Russia
Fig. 1 - S2 (08.08.2016) - Green algae or cyanobacteria have turned the Volga River in green on this image, possibly due to excess use of fertilizers.
The Volga is the longest river in Europe with 3531 km, flowing from an altitude of 228 m to -28 m. It is also Europe's largest river in terms of average discharge at delta at 8000-8500 m3/s and of drainage basin with a catchment area of 1 360 000 km².
Samara reservoir, a 550 km long reservoir created by the Samara dam: with its 6450 km² surface area, it is the largest reservoir in Europe. The Kama River joins the Volga by flowing into this lake.