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SPECIALTY WORKSHOP: SITES TRAINING AND INTRODUCTION TO WINDAM ASDSO Dam Safety 2008

PART 3 – USING SITES SOFTWARE C. Overview of SITES output a. Key text outputs b. Key graphical outputs. SPECIALTY WORKSHOP: SITES TRAINING AND INTRODUCTION TO WINDAM ASDSO Dam Safety 2008. IDE Concept. File management Data entry Output viewing & interpretation

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SPECIALTY WORKSHOP: SITES TRAINING AND INTRODUCTION TO WINDAM ASDSO Dam Safety 2008

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  1. PART 3 – USING SITES SOFTWAREC. Overview of SITES outputa. Key text outputs b. Key graphical outputs SPECIALTY WORKSHOP: SITES TRAINING AND INTRODUCTION TO WINDAM ASDSO Dam Safety 2008

  2. IDE Concept File management Data entry Output viewing & interpretation Comparison of alternatives

  3. View Summary Table • Built successful runs • Compare and view output • Home screenViewSummary Table

  4. Select File Click demob Highlights 1 column Activates buttons View Graphs View Text View output for a single run

  5. Text View

  6. Find Edit  Find Keyword search

  7. Keyword List • Storm HYD • Flood HYD • Drawdown • Rating Tables 1 & 2 • Aux Spwy Surface Cond. • Stability Analysis • Reach Surface Performance • Headcut Erosion • Summary Table • Error • Message • Warning • Note • Input Data • Comment • Basic Data • NRCS-PSH • NRCS-SDH • NRCS-FBH

  8. Error Message Error - program execution terminated More info: see SITES User Manual Data integrity check routine – prevent errors

  9. Warnings–Messages–Notes

  10. Warning • Program recovered • Extremely unusual data combinations • Determine reason for warning • Correct data (if appropriate) • Consult SITES Users Manual

  11. Messages & Notes • Unusual conditions - user aware • Procedure used for calculation • Information for tracking unusual output values • Review related input • Additional action not usually required

  12. Input Echo 80-80 List User-Windows screen input SITES creates text input file

  13. Comment Page

  14. Basic Data Less cryptic than input text file May require interpretation may require interpretation

  15. NRCS-PSH

  16. NRCS-SDH & -FBH

  17. SDH & FBH • May occur multiple times--look for context • SDH sets auxiliary spillway width • given slope through stability analysis of constructed exit channel. • FBH sets • Top of dam • Auxiliary spillway capacity • Auxiliary spillway integrity • FBH Duration • Now 24-hr • Previously 6-hr

  18. Drawdown Test Will reservoir drain before next storm? Check of PS capacity

  19. Rating Table #1 Principal spillway rating “List Elevation-Discharge-Storage Tables” on output options Auxiliary spillway not included

  20. Rating Table #2 Includes prin spwy and aux spwy Stage – storage

  21. Aux Spwy Surface

  22. Aux Spwy Surface • Summary by reach of aux spwy • CAPITALIZED reaches - constructed exit channel • lower case reaches - natural ground in inlet & exit • ! – reach to compute exit velocity • Verify input correct - any unrealistic short reach? • Assume normal depth in aux spwy

  23. Stability Analysis

  24. Stability Analysis • Conditions at peak of Stability Design Hydrograph • Input template form – results for 1 reach • Enter auxiliary spillway coordinates - all reaches • Velocity & effective stress • TR-60 • Ag. Handbook #667

  25. Reach Surface Performance Erosion stress Headcut formation

  26. Reach Surface Performance • Auxiliary spillway integrity analysis – Freeboard Hydrograph (FBH) • Single storm simulation runs – entered storm hydrograph • Integrity analysis - iterative three phase model • Phase 1- failure of the surface cover & formation of concentrated flow • Lists phase 1 failure time or • How close the reach is to failure

  27. Reach Surface Performance • Reach 5 • Stressed to 89% of predicted surface failure • Example 80 ft spillway width • 60 ft spillway - surface failed & exposed weak material below. • Reach 6 • downstream of exit • headcuts 1.7 hour after hydrograph peak • Reach 7 • 13% slope • Develops headcut 1.5 hr after spillway flow starts(~2 hours before hydrograph peak)

  28. Headcut Summary Most upstream headcut Deepest headcut

  29. Headcut Summary • Spillway integrity analysis • Table Headcut Information • Initial location • Final location • Final height • Potential spillway breach - overall erosion behavior • Composite of analyzed headcuts is plotted • Listed max height ~ max erosion depth

  30. Summary Table 1

  31. End Of Text Output Presentation text output input SITES 80-80 listing tables summary rating table keywords edit search find warnings messages notes comments view echo basic drawdown auxiliary principal spillway stability headcut erosion output input SITES 80-80 listing tables summary rating table keywords edit search find warnings messages notes comments view echo basic drawdown auxiliary principal spillway stability headcut erosion text input SITES 80-80 listing tables summary rating table keywords edit search find warnings messages notes comments view echo basic drawdown auxiliary principal spillway stability headcut erosion text output SITES 80-80 listing tables summary rating table keywords edit search find warnings messages notes comments view echo basic drawdown auxiliary principal spillway stability headcut erosion text output input SITES 80-80 listing tables summary rating table keywords edit search find

  32. IDE CONCEPT • Output viewing and interpretation

  33. The profile we’re using here is a silty, highly erodible material at the surface, over a layer of sandstone, over a shale

  34. we indicated that the spillway would be overexcavated a half-foot and backfilled with topsoil, so we have to tell the program what that material will be like (in place).

  35. These files are all the same except each has a different width of auxiliary spillway width (from 45’ to 100’).

  36. Specify Summary Fields

  37. Select file and highlight it to view text and graphics.

  38. What the summary table looks like depends on what variables you have selected. You can select from a list of some 45 input and output variables and order them as you wish.

  39. This plot shows clearly that there is a change in conditions occurring between bed widths of 70 and 60 feet.

  40. To understand what that “something” is, we need to look at the output in more detail. To do this, we click on a file (Democ) causing the line in the summary table associated with that line to be highlighted. In this case, the line associated with the 70 ft bed width has been highlighted. We then click on the button “View Graphics” to view the graphics associated with that line in the summary table.

  41. Another headcut has formed at the upper end of the exit channel and is working its way through the crest.

  42. Right Click for display information after a build.

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