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| 如果你忘記伊莉的密碼,請在登入時按右邊出現的 '找回密碼'。輸入相關資料後送出,系統就會把密碼寄到你的E-Mail。 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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