Changes in surface water area of Voëlvlei Dam near Gouda from October 2016 to 22 March 2017 as represented by a normalized difference moisture index (NDMI). The images, captured by the Sentinel-2 satellite, show relative moisture levels with dark blue representing wet areas (water) and red/orange shades representing dry areas. Voëlvlei Dam is one of the main sources of water to Cape Town.
