February 28, 2021

Explained: How the flash flood changed the color of Alaknanda

Written by Lalmani Verma, Compiled by Expenditure Desk |

February 20, 2021 4:00:03 AM

Alaknanda Sadoband climbs the iceberg and meets the Tully Ganga who took the deposits from the flood on February 7 at Vishnuprayag. Later Alaknanda was introduced to Nandakini in Nandaprayak, Bindar in Karnaprayag, Mandakini in Rudraprayag, and Bhagirathi. After that, it is called Ganga, which flows up to Rishikesh and Haridwar.

The pictures above show Alaknanda in Devprayag, which was devastated by the landslide and flash floods on February 7 in Rishi Ganga and Tulli Ganga. Uttarakhand state geologists and environmental scientists said.

Uttarakhand Pollution Control Board (UPCB) environmental engineer Angur Kansal said the river is generally clear in winter; It turns into a muddy mess only in the rainy season. Consul could not remember when Alaknanda saw this mud in the winter. The downstream flood of Tapovan weakened and the soil and debris reached Rishikesh on February 11, covering 250 km in three days. UPCB data show that the Ganges was clean in Rishikesh and Haridwar on February 6; It was classified as “muddy” on February 11 and is currently “turbulent”.

Dr. Kalachand Sain, Director, Wadia Himalayan Geography, said it was difficult to estimate the amount of debris that Rishi had fallen into the Ganges and carried down to Alaknanda. But the 0.2 to 0.4 million cubic meter ice sheet is estimated to have collapsed with a 40-degree slope of about 5,600m to 3,600m, which turns into a muddy swamp when plants and loose rock are picked up, Dr Sine said. Hemwati Nandan Bahuguna Garhwal University Professor in Srinagar, Y.P.