Unveiling the Mystery Behind Sikkim's Flash Flood: A NDMA Investigation

The National Disaster Management Authority (NDMA) suggests that the recent flash flood in Sikkim could be due to a mix of heavy rainfall and a Glacial Lake Outburst. The flood has caused significant damage, affecting several districts including Mangan, Gangtok, Pakyong and Namchi.

The National Disaster Management Authority (NDMA) of India has recently released a statement regarding the devastating flash flood that occurred in Sikkim on October 4. According to NDMA, the probable cause of this catastrophe could be a combination of excess rainfall and a Glacial Lake Outburst Flood (GLOF) event at South Lhonak lake in North Sikkim.

Glacial Lakes and Their Potential Threats

In its statement, NDMA highlighted that the Himalayan ranges are home to numerous glacial lakes, with an estimated count of about 7,500 as per remote sensing techniques. Among these, approximately 10 per cent are located within Sikkim's boundaries. Alarmingly, nearly 25 of these glacial lakes have been assessed as 'at-risk', posing significant threats to nearby communities and infrastructure.

The Flash Flood Incident

Elaborating on the details of the incident, NDMA reported that there was an abrupt surge in water flow in Teesta river during the early hours of Wednesday. This sudden increase resulted in considerable damage including washing away several bridges and parts of NH-10 highway. The Chungthang Dam was also impacted severely along with numerous small villages and towns situated upstream along the river valley.

The main districts affected by this calamity include Mangan, Gangtok, Pakyong and Namchi which have suffered substantial infrastructural loss due to this natural disaster.

Possible Cause: Excess Rainfall Coupled with GLOF Event

While scientists continue their investigation into pinpointing the exact cause behind this flash flood occurrence; preliminary findings suggest that it is likely due to an unfortunate combination of excess rainfall coupled with a GLOF event at South Lhonak lake located in North Sikkim. A GLOF event refers to a sudden release of water from a glacial lake, typically caused by dam failure or increased pressure due to additional water from melting glaciers.

In conclusion, this recent flash flood in Sikkim highlights the potential risks associated with climate change and its impact on natural disasters. The incident underscores the need for comprehensive disaster management strategies that take into account environmental factors such as excess rainfall and GLOF events. It is crucial for authorities like NDMA to continue their efforts in assessing at-risk areas, predicting possible disasters through advanced techniques and implementing effective preventive measures. This will not only safeguard infrastructure but more importantly, protect lives.