According to Bhagavata Purana, VishnuVishnu
Vishnu is one of the Supreme Gods of Hindus and is a part of Hindu Trinity,.. in one of his incarnations, appeared as VamanaVamana
In VAMANA Avatar, Vishnu incarnates himself as a dwarf priest... in the sacrificial arena of Asura King Mahabali. Then in order to measure the universe, he extended his left foot to the end of the universe and pierced a hole in its covering with the nail of his big toe. Through the hole, the pure water of the Causal Ocean (Divine Brahm-Water) entered this universe as the Ganges River. Having washed the lotus feet of the Lord, which are covered with reddish saffron, the water of the Ganges acquired a very beautiful pink color.
Because the Ganges directly touches the lotus feet of Vishnu (Narayana) before descending within this universe, Ganges is known as Bhagavat-Padi which means Emanating from the lotus feet of Bhagavan (God). It finally settles in Brahmaloka or Brahmapura, abode of BrahmaBrahma
According to Hinduism, the whole creation is the work of Trimurti (the Hindu Trinity)... before descending to planet Earth at the request of Bhagiratha and held safely by ShivaShiva
Shiva is one of the Supreme Gods of Hindu Trinity that ... on his head to prevent destruction of BhumiBhumi
Bhumi is the personification of Mother earth and is considered a form of Goddess Lakshmi... (Mother EarthThen, the river Ganges was released from Shiva 's hair to meet the needs of the country according to Hindu mythology. In other legends, Himavan fathered ParvatiParvati
After the death of Shiva's first love Sati, Shiva... and Ganga.
Several years later, a king named SagaraSagara
In Hindu mythology, Sagara is a prominent king of the Suryavansha dynasty in Satya Yuga. He has two wives, one a princess of the Vidarbha, and the other from royal lineage of Sivi... magically acquired sixty thousand sons. One day, King Sagar performed a ritual of worship for the good of the kingdom. One of the integral parts of the ritual was a horse, which was stolen by the jealous Indra. Sagara sent all his sons all over the earth to search for the horse. They found it in the nether-world (or Underworld) next to a meditating sage Kapila. Believing that the sage had stolen the horse, they hurled insults at him and caused his penance to be disturbed. The sage opened his eyes for the first time in several years, and looked at the sons of Sagara. With this glance, all sixty thousand were burnt to death.
The souls of the sons of Sagara wandered as ghosts since their final rites had not been performed. When Bhagiratha, one of the descendants of Sagara, son of Dilip, learnt of this fate, he vowed to bring GangaGanga
According to Bhagavata Purana, Vishnu in one of.... down to Earth so that her waters could cleanse their souls and release them to heaven.
Bhagiratha prayed to Brahma that Ganga come down to Earth. Brahma agreed, and he ordered Ganga to go down to the Earth and then on to the nether regions so that the souls of Bhagiratha's ancestors would be able to go to heaven. Ganga felt that this was insulting and decided to sweep the whole Earth away as she fell from the heavens. Alarmed, Bhagiratha prayed to Shiva that he break up Ganga's descent.
Ganga arrogantly fell on Shiva's head. But Shiva calmly trapped her in his hair and let her out in small streams. The touch of Shiva further sanctified Ganga. As Ganga travelled to the nether-worlds, she created a different stream to remain on Earth to help purify unfortunate souls there. She is the only river to follow from all the three worlds – Swarga (heaven), Prithvi (Earth) and, Patala (netherworld or hell). Thus is called "Tripathaga" (one who travels the three worlds) in Sanskrit language.
Because of Bhagiratha's efforts Ganga descended to Earth and hence the river is also known as Bhagirathi, and the term "Bhagirath prayatna" is used to describe valiant efforts or difficult achievements.
Another name that Ganga is known by is Jahnavi. Story has it that once Ganga came down to Earth, on her way to Bhagiratha, her rushing waters created turbulence and destroyed the fields and the sadhana of a sage called Jahnu. He was angered by this and drank up all of Ganga's waters. Upon this, the Gods prayed to Jahnu to release Ganga so that she could proceed on her mission. Pleased with their prayers, Jahnu released Ganga (her waters) from his ears. Hence the name "Jahnavi" (daughter of Jahnu) for Ganga.
It is sometime believed that the river will finally dry up at the end of KaliKali
There are several traditions of how Kali came into existence... Yuga (the era of darkness, the current era) just as with the Sarasvati river, and this era will end. Next in (cyclic) order will be the Satya Yuga It is also known as the Age of Truth. It is the age when humanity and morality governs the society and every action is performed with intrinsic goodness. It is believed that in this age, umanityis governed by Godsor the era of Truth.