The image, taken by Terra MODIS on October 27, 2012, shows normal conditions for River Krishna at this time of year. The images combine visible and infrared light so that water is black and dark blue, clouds are light blue and white, and plant-covered land is bright green. The Nagarjuna Sagar Reservoir visible in the image is part of a hydroelectric power and irrigation project credited with Green Revolution in India; it also is one of the earliest multi-purpose irrigation and hydro-electric projects in India. The Krishna River is the third longest river in India after the Ganges and the Godavari. It starts in Western Ghats, flows through Karnataka and Andhra Pradesh.