JNieber_Ditch - Geomorphic Characteristics of Drainage...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Geomorphic Characteristics of Drainage Ditches in Southern Minnesota, and the concept of a Two- Stage Ditch Design Brad Hansen, Bruce Wilson, Joe Magner, and John Nieber Brad Hansen, Bruce Wilson, Joe Magner, and John Nieber University of Minnesota Sleepy Eye, MN Outline Outline Background Site Selection Field Methods Results Current Designs Current Designs 27K miles in Mn Maintenance Biotic potential Blue Earth County $650K in 2005 $1.2M in 2006 Ohio $450/mi/yr Problem: Problem: Seepage Seepage -induced instabilities induced instabilities Faribault County Faribault County Problem: Problem: Management of Surface Runoff Faribault County Problem: Problem: Design of surface inlets Design of surface inlets Bare bank erosion
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Bricelyn Problem: Problem: Natural Natural geomorphoric geomorphoric processes Mississippi River Jacobson Ohio Design: Geomorphoric Geomorphoric concepts concepts Bankfull Width Bankfull Width Flood-Prone Width Bankfull discharge is the discharge that forms the channel shape because it is the discharge that carries most of the sediment Flood prone width is that width of channel when filled will spill over into the flood plain; defined as having twice the depth of bankfull. A Two Stage Channel From J. D’Ambrosio et al. Maintenance Often Removes Fluvial Benches That Will Rebuild Again Material commonly removed during cleanout From J. D’Ambrosio et al. Features due to Bank Failure are not Fluvial Benches Bank Failure Banks that have slumped From J. D’Ambrosio et al.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/09/2010 for the course NL MV 00923 taught by Professor Messing during the Spring '10 term at Sveriges lantbruksuniversitet.

Page1 / 7

JNieber_Ditch - Geomorphic Characteristics of Drainage...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online