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Software Introduction: Split Desktop Version 3.0 Kerry M. Robinson Hydraulic Engineer, ENTSC

Software Introduction: Split Desktop Version 3.0 Kerry M. Robinson Hydraulic Engineer, ENTSC. Objective. Overview rock sizing software capabilities and limitations. Redirective Techniques. Drop Structures/ Grade control. Stream Channel Stabilization and Restoration Projects.

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Software Introduction: Split Desktop Version 3.0 Kerry M. Robinson Hydraulic Engineer, ENTSC

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  1. Software Introduction: Split Desktop Version 3.0Kerry M. RobinsonHydraulic Engineer, ENTSC

  2. Objective • Overview rock sizing software capabilities and limitations

  3. Redirective Techniques

  4. Drop Structures/ Grade control

  5. Stream Channel Stabilization and Restoration Projects

  6. We have many methods to design rock treatments.

  7. How do you insure that delivered rock meets your specification?

  8. Test pile • ASTM • Sieve Analysis • Weight • Experience • Others?

  9. Why use this proprietary software? Safety Speed Reduce subjectivity Improve quality control Feedback to rock supplier The software is not cheap. It costs about $8000 per fully licensed copy.

  10. How does it work? • Take a digital photo with scaling object(s) in the photograph. • Process the photograph with this software.

  11. How does it work? • Software automatically delineates or identifies edges of rock fragments. • You scale the known size object.

  12. Results Software provides a median rock size (D50) and a sample gradation

  13. Assumptions • The surface material is representative of the material underneath. • Your photo sample is representative.

  14. Fines Assumption For this evaluation, the fines have been assumed to be zero.

  15. Lighting • If possible, take pictures with uniform lighting • The software will see a shadow as a rock edge • More manual editing will be needed.

  16. Sample Size • Keep the sample small but representative • Approx 8 D50 wide (rough estimate)

  17. Angle of Photograph • Best results when photo is normal to rock surface. • The software automatically compensates for the photo angle using the scaling objects. • Recommend a photo angle less than 45 degrees from normal. Use scaling objects in two diagonal corners of the photo.

  18. What is the median stone size? Let’s see how good you are at estimating rock size. The scaling disks are 9 inches in diameter. What is the median rock size of this sample?

  19. The sieve analysis for this material was 11 inches. This program calculates 11.4 in. How did you do?

  20. Another Example What should the D50 be for 3 inch cubes?

  21. The output says the D50 is 2.75 inches. Is it wrong? Life is not perfect and neither is this software.

  22. Conclusions • The split engineering software can accurately determine rock size. • Users need to understand how the software works to minimize problems. • Rock size and gradation can be obtained rapidly and safely using digital photography. • Loads of material have been rejected using this tool.

  23. Split-Desktop Version 3.0 is available as a 30-day free trial version. • It is CCE approved for limited use. • Go to www.spliteng.com

  24. Stream Restoration: Combining Rock with Vegetation Kerry M. Robinson Hydraulic Engineer ENTSC Questions?

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