... ( O is top of flood plain ) : 0 to 0.6 m , Dso is 0.0003 m ( .30 mm ) ; 0.6 to 3 m , Dso is 0.002 m ( 2.0 mm ) ; 3 m to 9 m , Dso is 0.0079 m ( 7.9 mm ) .
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