Dehradun. The destruction in the Dhauli Ganga catchment area of Chamoli district has led to the Avalonch shoot of Rimkhim drain. From this drain, huge pieces of ice broke and fell in the Upper Sumana region. In the Sumna area where the ITBP and BRO camp is there, the threat remains, as the region has an avalanche shoot of Kiogad along the Rimkhim drain (where avalanche events occur). The study of satellite images by the Uttarakhand Space Applications Center (USAC) assessed the condition of the Sumna region.
According to USAC Director Dr. MPS Bisht, the entire catchment area is the Dhauli Ganga River. The region has been highly vulnerable for decades in terms of natural disaster. The reason is climate change. Because at one time this entire area was called Rain Shadow Zone. Here, there used to be little rain. Due to which there are no glaciers in this area. However, now when it started raining here, snow started accumulating in Rimkhim drain, Kiogad etc. Avalonch (avalanche) occurs when the snow accumulates in large quantities and then there is a strong fumigation. Due to this, there are active avalanche zones here. The Friday night incident is also the result of a similar Avalonch shoot. USAC Director Dr Bisht says such environmental incidents cannot be prevented, but such sensitive areas need to be constantly monitored.
USAC Director Dr. MPS Bisht said that when the glacier moved backward during the last glacial magma, he left a huge amount of debris behind him. There are dozens of evidences of such debris from Joshimath to Sumna. The area of the debris extends up to 200 meters. In such a situation, during the natural disaster, this debris can cause heavy havoc. Therefore, it is necessary to have such an institute in Uttarakhand, which is dedicated only to study on glaciers.
According to USAC Director Dr. Bisht, Dhauli Ganga is made up of four different rivers / gad. It contains water from Ganesh Ganga, Ghriti Ganga, Rimkham Nala and Kiogad. Their confluence is between Sumana and Malari and after this the river becomes Dhauli Ganga. This entire region is also known as Dhauliganga Catchment.
The most serious thing is that there are avalanche zones in all the river areas and due to these many artificial lakes can be formed or heavy debris can flow into the lower areas. Dhauli Ganga goes ahead and becomes Vishnugad by meeting the sage Ganga and then Alaknanda. In Devprayag, the Alaknanda river joins the Bhagirathi to form the Ganges.
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