Home Natural Hazard Management Satellite imageries monitor impending flashflood threat

Satellite imageries monitor impending flashflood threat

Recent satellite imageries have shown that an artificial lake formed by landslides in the Pareechoo river in Tibet close to the Indian border has expanded by five hectares. An analysis of the imageries received from a series of remote-sensing satellites on August 12 showed that the lake’s size now stands at 193 hectares as against the 188 hectares shown by previous images (August 9). Images received on August 13 were blurred by cloud, and those received on August 14th are being analyzed.

Officials are not taking the fact that the lake’s size grew by five hectares in just three days between August 9 and 12 lightly. The Indian space department’s National Remote Sensing Agency (NRSA) at Hyderabad is monitoring the lake’s size through images transmitted from the IRS-P6 and other remote-sensing satellites. The NRSA has already studied imageries taken on May 10, July 16, July 26 and August 9. These showed that while there was no lake on May 10, its size grew from 123 hectare on July 16 to 188 hectares on August 9.

With the level of the Pareechoo river rising, the areas along the banks of Sutlej and Spiti rivers in Himachal in India remained on high alert. IAF helicopters made aerial survey of the areas and the army remained on standby mode to evacuate people and assist administration in case of flash floods.