Sikkim steps up flood monitoring along Himalayan rivers amid Nepal flash flood concerns

Authorities in Sikkim's Mangan district have strengthened flood monitoring and early warning measures along vulnerable Himalayan rivers and glacial lakes amid heightened concerns following the recent flash floods in Nepal.

District Collector Anant Jain said several high-risk glacial lakes in the region are equipped with systems that continuously monitor water levels and water flow. Night-vision cameras have also been installed to enable round-the-clock surveillance of vulnerable areas.

“Whenever the water level of the lake increases or decreases, the information goes to the headquarters and is sent to the district administration,” Jain said.

An early warning system has also been installed along the Thangu-Lachung stretch. Around four monitoring points have been established between the Moguthang axis, where water flow is concentrated, and two additional monitoring units have been placed on the Lachung side.

The systems monitor the speed and height of water flow and allow authorities to quickly transmit critical information to the headquarters, Jain said.

The district administration has also focused on reducing human exposure to flood-prone areas. Jain said there has been a noticeable decline in construction and encroachment along riverbanks and low-lying areas following repeated advisories against development in vulnerable zones.

Meanwhile, a protective wall project along the riverside is in the final stages of sanction. Jain said the proposed river-training work would help strengthen flood mitigation measures once approved and implemented.

“If the work is sanctioned and the whole river training work starts, then it will be very helpful to mitigate [flood risk],” he said.

The measures assume significance amid renewed concerns over disaster preparedness across the Himalayan region following devastating flash floods in Nepal. The incidents have prompted authorities in Himalayan states to review early warning systems and preparedness measures for potential floods and glacial lake-related disasters.