not so natural - a photo on Flickriver

not so natural

            Crater lakes don't just take care of themselves.  Or rather, they do, but not with much regard for the nearby humans.  Long ago, a village was established on the shores of the Lagoa de Sete Cidades, which was problematic because the lake's level would rise and fall dramatically based on the prevailing rainfall and weather, since its volume is determined almost solely by rain and evaporation rates.  This was a problem for the village, which would be periodically flooded in its entirety.  The solution eventually was to bore a runnel through the caldera rim, and install a sluice system at one end of the lake, allowing excess water to be siphoned off for usage elsewhere, at whatever rate was needed to maintain the lake's level.  Unlike such waterworks in America, one can just walk right into the critical infrastructure freely; indeed, one can walk through the tunnel under the caldera rim if one were so inclined.  But it is a very long, very wet tunnel, though you can just barely see the proverbial light and the end of the tunnel if you peer closely at the end, as Lonnie is doing.
   

Taken in: Portugal / Azores / Sete Cidades / Cerrado das Ereiras (show map)

Taken on: September 28, 2024

Tags:

portugal

azores

são miguel

sete cidades

lagoa de sete cidades

lagoa azul

tunnel

sluice

waterworks

pipe

pipes

stairs

stair

staircase

stairway

passage

drain

water management

railing

junta geral « less

Sets appears in: • 2024 portugal

Camera: Google Pixel 6 Pro, f/2.2, 1/592 sec, 2.4mm, ISO 49 (more info) (hide info)

Camera:	Google Pixel 6 Pro
Aperture:	f/2.2
Exposure Time:	0.002 sec (1/592)
Focal Length:	2.4mm
ISO:	49
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Center-weighted average
White Balance:	Auto
Color Space:	sRGB
Software:	HDR+ 1.0.641377693zd
Show full info

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