Why did Ecuador’s tallest waterfall stop flowing?

By Kasha Patal/NASA Earth Observatory.

Surrounded by lush vegetation and rare butterflies, the San Rafael Waterfall was one of the most captivating landscapes in Ecuador. With water dropping 490 feet (150 meters), the river and falls cut through a thick patch of cloud forest at the intersection of the Andes Mountains and the Amazon Basin. As the country’s tallest waterfall, it attracted tens of thousands of visitors per year.

But now, the cascade has disappeared. It stopped flowing on February 2, 2020.

According to media reports, a huge sinkhole appeared in the Coca River a few meters (yards) before the falls and diverted the watercourse. Now, the water falls in three separate sections and at a less steep slope, which cannot be seen from viewing stations located around the original waterfall. Researchers believe the three streams could cause erosion at the channel’s origin and create a river upstream, which might change the topography of the valley.

The cause of the sinkhole is under investigation. Some geologists think the deformation occurred naturally, while other researchers suspect it may be tied to the new construction of the country’s largest hydroelectric plant. No matter the cause, Ecuador’s tourism ministry does not plan to reconstruct the riverbed or restore San Rafael. The waterfall is now part of history.

Bottom line: San Rafael Waterfall, Ecuador’s tallest waterfall, disappeared in February 2020 due to a huge sinkhole.

Via NASA Earth Observatory