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View Diary: A Drying Lake (89 comments)

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  •  A graph of historic levels would be useful. (0+ / 0-)

    Missing from this article is a comparison of lake levels at present with the full historic range. Where do the levels this month fall within the historic range? 10th percentile? 25th percentile? 30th percentile? Is the low level today truly unprecedented or is it within the documented, long-term record of variation?

    I am skeptical that the lower water levels could create a 'rebounding' of nearby land levels. If anything, lower lake levels could cause localized subsidence, since there would be less water in soil pore spaces on the lake margin. Water is incompressible, so removing water would tend to cause unconsolidated sands and gravel to compress under their own weight, not to rebound upward.

    My name is Douglas Watts.

    by Pometacom on Sat Jan 19, 2013 at 09:17:13 AM PST

    •  Water levels this month for Lake Michigan-Huron (1+ / 0-)
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      CA wildwoman

      fall at the bottom of the historic range. Here are a few things to read concerning the current Lake Michigan-Huron water levels

      http://newswatch.nationalgeographic.com/...

      Last month’s average for both lakes – considered one lake for the purposes of hydrologic studies because of the connection at the Straits of Mackinac – was 576.15 feet, according to the U.S. Army Corps of Engineers (USACE) water level report. This is about a half-inch below the record for the same month set in 1964 since the USACE began keeping coordinated records in 1918.
      The International Upper Great Lakes Study provides a comprehensive study of upper great lakes water levels

      http://www.iugls.org/

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