Why in News?
Delhi Lieutenant Governor VK Saxena, setting an ambitious four-pronged strategy to clean the Yamuna River.
- It is a major tributary of River Ganges.
- It is one of the longest river (1,376 kilometers) in India which does not directly flow to the sea.
- It is the largest tributary of the Ganga in the northern plains.
- Origin - It originates from the Yamunotri glacier in the Garhwal Himalayas of Uttarakhand.
- Flowing states - Uttarkhand, Himachal Pradesh, Haryana, Delhi, Uttar Pradesh and Rajasthan (not a riparian zone) before it merges with the Triveni Sangam, Ganges River in Allahabad.
- Tributaries in Himalayas - Rishi Ganga, Kunta, Hanuman Ganga, Tons (largest) and Giri.
- Tributaries in the plains - Hindon, Chambal, Sind, Betwa and Ken.
Gobind Pashu Vihar Sanctuary, Rupin valley is situated on the Tons river.

- Historical Cities- Delhi (the national capital), Mathura (associated with Lord Krishna), Agra (home to the Taj Mahal), and Vrindavan (a revered pilgrimage site).
Reference
Live Mint | Yamuna River