3000年前にイラン（ペルシャ）で砂漠に作られた地下水道カナートの地表部のメンテナンス換気口の列

3000 years ago, in what is now Iran, a type of underground aqueduct called a qanat was engineered to transport water over long distances to farms and villages that couldn’t exist without it in the hot dry climates The holes supplied oxygen to workers who dug the aqueduct by hand… twitter.com/i/web/status/1… pic.twitter.com/ReGzWGf6TA

2023-06-24 01:44:17

拡大

Science girl @gunsnrosesgirl3

en.wikipedia.org/wiki/Qanat

2023-06-24 01:45:10

リンク Wikipedia Qanat A qanat or kārīz is a system for transporting water from an aquifer or water well to the surface, through an underground aqueduct; the system originated approximately 3,000 years ago in what is now Iran. The function is essentially the same across North A 491

Science girl @gunsnrosesgirl3

The reason qanats do not appear as straight lines is primarily due to the need to follow the natural contours of the land. The process of creating a qanat involved identifying a water source, usually an underground aquifer, and then digging a tunnel from a lower elevation to tap… twitter.com/i/web/status/1…

2023-06-24 02:00:31

Science girl @gunsnrosesgirl3

As well as air and ventilation the other general purposes of these holes include 1. Access Points to the underground channel, they allow people to enter the qanat for maintenance, repairs, and cleaning purposes. 2. Extraction of Soil and Debris: During the construction 3.… twitter.com/i/web/status/1…

2023-06-24 02:38:08

Science girl @gunsnrosesgirl3

As well as air and ventilation the other general purposes of these holes include 1. Access Points to the underground channel, they allow people to enter the qanat for maintenance, repairs, and cleaning purposes. 2. Extraction of Soil and Debris: During the construction 3.… twitter.com/i/web/status/1…

2023-06-24 02:38:08