·
·
Miscellaneous
Scientists warn that Lake Kivu, holding vast amounts of CO2 and methane, threatens two million people with a potential catastrophic eruption.
Two million people live along the shores of Lake Kivu, a body of water that scientists have labeled a "ticking natural time bomb" that could explode at any moment. Located in a tectonically active region on the border of Rwanda and the Democratic Republic of the Congo, the lake's danger dwarfs that of a similar, smaller lake in Cameroon that killed 1,800 people in a single night in 1986.
That disaster, at Lake Nyos, was not caused by war or disease but by a rare phenomenon known as a limnic eruption. Carbon dioxide, which had been accumulating in the lake's depths for years, suddenly burst to the surface. A dense cloud of the gas, heavier than air, rolled through the valleys, displacing oxygen. People and animals suffocated before they could comprehend what was happening.
Lake Kivu is considered the "big brother" of Lake Nyos, and its danger is far more severe. It reaches a depth of about 480 meters and spans a surface area of 2,700 square kilometers. Trapped within its deep waters are an estimated 256 cubic kilometers of carbon dioxide and 65 cubic kilometers of methane.
The surface water of the lake is fresh, but deeper layers are saturated with these gases. While carbon dioxide does not burn, it displaces oxygen. A massive release of this gas could smother surrounding villages and towns, mirroring the tragedy at Lake Nyos. Methane, however, presents an even more explosive threat. If it mixes with oxygen, it could ignite, causing a massive blast and stripping the entire region of breathable air.
Since the year 2000, scientists have been working to prevent a catastrophe through the KivuWatt project. The process involves drawing water from the depths where the gases accumulate, extracting the methane to generate electricity, and then returning the purified water to the lake. This operation is akin to "discharging" a natural bomb of its payload.
The project already provides power to local residents and gradually reduces the pressure of gases in the depths. However, it does not fully solve the problem. Scientists continue to monitor the lake, study its behavior, and develop early warning systems. After the 1986 disaster, researchers began working to keep the gas at the bottom of Lake Nyos, and only by 2016 were they able to reduce the danger level there.
