Brandel - Planning County Ditch Projects

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Brandel - Planning County Ditch Projects

  1. 1. Planning County Ditch Projects Utilizing LiDAR <ul><li>June 4, 2009 </li></ul><ul><li>Chuck Brandel, P.E. </li></ul>Improving Efficiency and Saving Money
  2. 2. Overview <ul><li>Why LiDAR? </li></ul><ul><li>Analyzing Alternatives </li></ul><ul><li>Example Project </li></ul><ul><li>Limitations of Data </li></ul><ul><li>Cost Savings </li></ul>
  3. 3. Why Use LiDAR on Ditch Projects?
  4. 4. Why Use LiDAR on Ditch Projects? <ul><li>Preliminary Planning </li></ul><ul><li>Cost Estimating </li></ul><ul><li>Watershed Delineation </li></ul><ul><li>Initial Stormwater Modeling </li></ul><ul><li>Earthwork Calculations </li></ul><ul><li>Alternative Site Selection </li></ul>
  5. 5. Why Use LiDAR on Ditch Projects? <ul><li>Can all be completed without a traditional (and expensive) topographic survey </li></ul>
  6. 6. Blue Earth County Ditch 57
  7. 7. Shaded Relief Map from LiDAR
  8. 8. Color Relief Map from LiDAR
  9. 9. Survey Resolution - USGS
  10. 10. Survey Resolution - LiDAR
  11. 11. Alternative Treatment - Inline Storage
  12. 12. Alternative Treatment - Detention
  13. 13. Alternative Treatment - Two Stage Ditch
  14. 14. Alternative Treatment - Surge Pond
  15. 15. Alternative Treatment - Restoration
  16. 16. Why Use LiDAR on Ditch Projects?
  17. 22. Limitations of the Data <ul><li>Vegetated and Wooded Areas </li></ul><ul><li>Ditch Bottoms </li></ul><ul><li>River and Stream Interactions </li></ul><ul><li>Tile Inlets </li></ul><ul><li>Culvert Crossings </li></ul><ul><li>Stream/Ditch Bank Erosion </li></ul><ul><li>Developing Areas </li></ul>
  18. 23. Thank You! Chuck Brandel, P.E. chuck.brandel @ is-grp.com

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