The most fundamental of Hindu deities, is the Trinity of Brahma, Vishnu and Shiva - popular deities include Ganesha, Krishna, Hanuman and goddesses like Lakshmi, Durga,Saraswati.
To bring water to the land areas of the South, Sage Agastya, with the blessings of Brahma, obtained water in his kamandalu (the vessel used to hold water for rituals of worship) from Shiva. He then came down south wanting to find the ideal spot from which the river could flow, and reached the Kodagu (Coorg) hills. He called out to a little boy (Ganesha in disguise), and asked him to hold the vessel carefully while he searched around for a good spot. Ganesha, in his wisdom, selected the right place for the origin of the river, and left the kamandalu on the ground at the spot. A crow came and sat on the vessel and when Agastya returned and saw it, he shooed it away. When it flew off, it upset the kamandalu and the water gushing forth was the sacred River Kaveri flowing from the spot now known as Talakaveri Divinity manifests itself in many forms to help the people, and the benefits of the waters of the Kaveri are enjoyed to this day