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In the northeastern Indian state of Sikkim, there used to be a huge hydroelectric power station called the Teesta River Third Hydropower Station. This ambitious project, with an installed capacity of 1.2 million kilowatts and more than 60% of Sikkim, is the largest hydropower station in the region. However, its fortunes were reversed in a sudden flash flood.
The Teesta River 3 Hydropower Station is located in northeast India, with an extremely complex geographical environment, located on the southern slopes of the Himalayas. Although it was considered indestructible, it suffered a serious setback by the trick of fate. A torrential rain hit the northern part of Sikkim on the night of October 4, and Lake Lonak, a magnificent alpine lake known as the "water of Mount Everest", became the source of the disaster.
The water level in Lohnac Lake rose sharply, causing the lake to burst its banks and floodwaters frantically pouring into the Teesta Valley. The sudden flash flood left no warning sign for the hydropower plant operators, who were completely unprepared for such a severe natural disaster. Crews at the hydropower plant arrived in a hurry, trying to open the floodgates to release the floodwaters to relieve the pressure. However, the impact of the flood was so violent that the dam of the hydroelectric power station began to move, then quickly burst and collapsed, disappearing into the flood.
The incredible sight of this huge dam, once considered impregnable, was vulnerable to the impact of flooding. It was originally a reinforced concrete faced rockfill dam, which normally should have been quite strong, but it was completely destroyed by the impact of this flash flood. What is even more puzzling is that the floodgate and diversion trough of the hydropower station are not integrated with the hydropower dam, they are independent building structures and do not have effective connection parts. This way of designing and building was clearly deeply flawed, with disastrous consequences.
The destructive power of the flood was not limited to the hydropower plant itself, it also destroyed 15 bridges in the Teesta Valley, a large number of houses and buildings were washed away, roads were washed off, and the entire area was thrown into chaos. According to statistics, the flood caused more than 50 deaths and 150 missing, and the number of people affected by the flood reached 22,000. The flood swept through, taking everything from the ground and turning the downstream area into a flood.
The washout of the dam has attracted widespread attention, and many believe it was a serious engineering error. Perhaps there are problems of cutting corners and corruption, or there may be serious mistakes in the operation and management of hydropower plants.
This incident reminds us that quality and safety must be the primary consideration in engineering construction, and that the risk of natural disasters also needs to be paid enough attention. Only in this way can we make smarter decisions in the face of future challenges, reduce the cost of disasters and ensure the safety of people's lives and property.
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