for scene 53 of the video " Unlimited Fresh Water - part 1" by Rolf Witzsche - Ice Age Ahead not Global
here for a larger image
Ice sheets 12,000 feet deep
When water gets laid up on land in the form of ice, and this to such an extreme extent that ice sheets form up to 12,000 feet deep so that the ocean levels drop by nearly 400 feet, one can assume that there won't be much water flowing down any river, anywhere.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.