Watch this mesmerizing vortex in a Portuguese lake swallow excess rainwater

Nicole Jewell
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It really is amazing what nature and man can do when they work together. Portugal’s Covão do Conchos dam funnels water into an amazing ground-level waterfall during flood season. The mesmerizing vortex is a beautiful example of a “bell-mouth spillway,” a unique form of infrastructure that controls water overflow during particularly heavy rain periods by rerouting the water elsewhere. Take a look at the video below.

Built in 1955 out of masonry concrete and granite, The Dam of Conchos is 4.6 meters high and has a storage capacity of 120,000 cubic meters. The construction formed part of a large hydroelectric development of the Serra da Estrela that aimed to divert water between the Ribeira das Naves river and Bayou Lagoon Long.

The spillway built into the dam is a 1.5km tunnel that funnels excess amounts of water to avoid flooding. Although heavy rain in the area is scarce, visitors can view the beautiful vortex-like spectacle for a short time every year.

Conchos Dam Portugal
Conchos Dam Portugal

It really is amazing what nature and man can do when they work together. Portugal's Covão do Conchos dam funnels water into an amazing ground-level waterfall during flood season.

Conchos Dam Portugal

The mesmerizing vortex is a beautiful example of a “bell-mouth spillway,” a unique form of infrastructure that controls water overflow during particularly heavy rain periods by rerouting the water elsewhere.

Covão do Conchos - Vista aérea (Probilder)