• Rodeo@lemmy.ca
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    1 year ago

    Why only 21 inches? Soil temps aren’t stable until like 6 feet down, and then it’s closer to 12 C.

    • Lazz45@sh.itjust.works
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      1 year ago

      That is the deepest depth I could find being actively tracked on the website I ended up on. I did not wanna do a deep dive into “great” average soil temp data lol. If you have a good source of data I will gladly change my comment to include the updated numbers. I wanted to say the average soil temperature at depth is ~50-55 degrees F, but I hopped online to make sure that was not a number that I know to be true due to where I live. Good to know that its roughly 6 feet where it stabilizes

      • Rodeo@lemmy.ca
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        1 year ago

        If you go down deep enough the earth temperature is stable at 12 C. But I’m pretty sure that’s like thousands of feet down. Geothermal rigs drill 500+ meters (1600 feet) down. Having a hard time finding a source on the stable earth temp though.

        I mentioned 6 feet because it’s well below the frost line where I am, but I guess in that part of Iran they probably don’t have to worry about that.

        Mostly I was just wondering if you had found something on how deep those waterways were actually built.