"The flash floods can be attributed to sequential intermittent damming at three different places, Raunthi Gadhera stream being dammed first in its upper reaches, Rishiganga river dammed subsequently to the north of Murunna, and the Dhauliganga river being dammed around Raini village at the upstream of its confluence …Dec 21, 2021
What causes flash floods in Chamoli Uttarakhand?
What caused the flash floods in Chamoli Uttarakhand?
A huge mass of rock and snow broke from a left valley of Raunthi Gad, crashing down in the Rishiganga valley and triggering a deadly flood in the Rishiganga river that wiped out a hydel power plant in Uttarakhand's Chamoli district in February, a report by the Geological Survey of India (GSI) has said.
What are the main causes of a flash flood?
Most flash flooding is caused by slow-moving thunderstorms, thunderstorms repeatedly moving over the same area, or heavy rains from hurricanes and tropical storms. Occasionally, floating debris or ice can accumulate at a natural or man-made obstruction and restrict the flow of water.
What caused flood in Uttarakhand 2021?
On February 7, 2021, a portion of the Nanda Devi glacier broke off releasing the water trapped behind the ice, creating an avalanche and deluge that quickly turned into flash floods in Uttarakhand's Chamoli district.
What caused the recent floods in Uttarakhand?
'Western disturbance' in Uttarakhand The deluge in Uttarakhand has been attributed by experts to a phenomenon called a “western disturbance”. A western disturbance is a storm originating in the Mediterranean Sea, which then moves eastwards.
What are the causes and effects of floods?
When rainfall in low-lying areas and urban environments fall faster than the ground can absorb, water height rapidly rise, resulting in floods. Extreme rainfall in river courses contribute to flooding as well, as water travels down and overflows riverbanks onto surrounding land.
What are the causes of floods Wikipedia?
Flooding is usually caused when a volume of water within a water body, such as a lake, overflows outside it. Sometimes if a dam breaks, it suddenly releases a large amount of water. The result is that some of the water travels to land, and 'floods' the area. Many rivers are in a channel, between river banks.
Which river caused flood in Uttarakhand?
AP Submerged cars are seen at a flooded hotel resort as extreme rainfall caused the Kosi River to overflow at the Jim Corbett National Park in Uttarakhand.
What caused the sudden erratic natural disaster in Uttarakhand in Feb 2021?
It was caused by a large rock and ice avalanche consisting of material dislodged from Ronti peak. It caused flooding in the Chamoli district, most notably in the Rishiganga river, the Dhauliganga river, and in turn the Alaknanda—the major headstream of the Ganges (Maps 2 and 3).