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| 若新密碼無法使用,可能是數據未更新。請使用舊密碼看看。 本帖最後由 kakurenbou 於 2018-7-14 11:28 AM 編輯
In February 2017, the Minnesota Department of Natural Resources said that water that disappears into the rock at Devil's Kettle resurges in the stream below the waterfall. Hydrologists compared the amount of water flowing above the waterfall with the amount flowing below it to see if some water was lost somewhere between the two locations。
In fall 2016, the DNR reports, hydrologists measured water flow above Devil's Kettle at 123 cubic feet per second, while several hundred feet below the waterfall, the water was flowing at 121 cubic feet per second. ... |
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