Can 'self-sustaining ditches' clean up waters?
WILLMAR -- There are 27,000 miles of open ditches in Minnesota, and quite possibly, every mile has been built based on a flawed design.
Engineers have always designed ditches to accommodate the volume of water expected at a peak flow event, according to Dr. Bruce Wilson, a professor of engineering at the University of Minnesota.
The design assures the channels can handle large rain events.
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