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1Geomorphic Characteristics of Drainage Ditches in Southern Minnesota, and the concept of a Two-Stage Ditch DesignBrad Hansen, Bruce Wilson, Joe Magner, and John NieberBrad Hansen, Bruce Wilson, Joe Magner, and John NieberUniversity of MinnesotaSleepy Eye, MNOutlineOutline•Background •Site Selection •Field Methods•ResultsCurrent DesignsCurrent Designs•27K miles in Mn•Maintenance•Biotic potential•Blue Earth County–$650K in 2005–$1.2M in 2006•Ohio–$450/mi/yrProblem:Problem:SeepageSeepage-induced instabilitiesinduced instabilitiesFaribault CountyFaribault CountyProblem:Problem:Management of Surface RunoffFaribault CountyProblem:Problem:Design of surface inletsDesign of surface inletsBare bank erosion
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