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CSIR-NGRI working on early warning systems in Himalayan States -V Geetanath

-The Hindu

The scientists in the institute have identified a few locations in the higher reaches of Uttarakhand for “densification” of seismometers and river gauges to take the total number to 100 from 60.

The National Geophysical Research Institute (NGRI) of the Council of Scientific and Industrial Research has begun field studies to put in place an early-warning system in the Himalayan States against major and sudden floods, rockslides, landslips, glacier lake bursts and avalanches and to prevent Chamoli kind of disasters in future.

“Right now, we are able to detect the major events through geophysical and seismological observations, but are yet to demonstrate the minimum threshold or the maximum distance from which we can give an early warning of natural disasters, which are 10 times less intense than what happened at Chamoli, with the help of various instruments. Our scientists are working on those systems,” NGRI Director V.M. Tiwari said.

The scientists in the institute have identified a few locations in the higher reaches of Uttarakhand for “densification” of seismometers and river gauges to take the total number to 100 from 60. The objective is to closely monitor the river flows in specific areas along the catchment to detect any sudden rise in water levels or flooding threshold that can lead to a hazard. “A 5 cm of rainfall or a glacier melt may not be hazardous, but if there is a heavy rockfall or sudden lake burst, there could be massive flooding. What is the minimal level of time required and distance from which an early warning can be given will be assessed after discussions with the various stakeholders,” Mr. Tiwari said in an exclusive interaction.

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