HYDROLOGIC AND HYDRAULIC ANALYSIS USING   ARCGIS, ARC HYDRO, AND HEC-GEORAS              Kurt Baron, GISP, WEST Consultant...
Scour POA Development1.   Estimate Peak Discharges2.   Perform Field Reconnaissance3.   Create Hydraulic Model & Compute S...
Scour Critical Bridges - Hawaii 56 Hawaiian Bridges Identified as Scour Critical:    21 on Oahu    13 on the Big Island...
Maui           Big IslandMolokai          Kauai
Step 1.Estimate Peak Discharges Flood-frequency analysis USGS regression equations Available peak discharges (FEMA, Cor...
Data:                     Software: National Bridge          ArcGIS, Spatial Analyst,  Inventory                 3D Anal...
Step 1. Estimate Peak Discharges Flood-Frequency Analysis    Regression Equations  (~30% of Bridges)            (New in ...
•50-foot DEM•Streams layer•Mean annual rainfall•Arc Hydro
Kauai ScourCritical BridgeWatershedsMt. Wai‘ale‘ale:450 to 500inches per year!                   Wailua River             ...
Step 2.Perform Field Reconnaissance  Obtained As-builts  Customized Field Form  Field Recon Team:      Structural Engi...
Field Form
Field Form(cont’d)             Mauka = toward the mountains, inland             Makai = toward the sea
Vertical Datum?Field Form(cont’d)
Local Fish& Wildlife(foundunder thebridges)
Hakalau Bridge Built in 1953  Sand with surface gravel 100-Yr Discharge is 5,710 cfs  170-ft high deck
Hakalau Bridge
Step 3.Create Hydraulic Model &Compute Scour             HEC-RAS                          HEC-18 scour                  ...
Data:                     Software: Intermap IfSAR DTM       ArcGIS, Spatial Analyst,  v1.5                      3D Anal...
•Intermap IfSAR DTM v1.5•Coastal Geology Group Imagery•HEC-GeoRAS
Wailuku River Bridge Flood flows (Q100: 135,000 cfs) and tsunami bores Tsunamis occurred in 1946 (Aleutian Islands  eart...
Wailuku River Bridge& Tsunami Path                       USGS
Step 4.Develop Scour Countermeasures& Recommend Actions Hydraulic/Structural Countermeasures:   Riprap                  ...
Waikapu Bridge   Built in 1937   100-Yr Discharge: 1,180 cfs   Boulders and bedrock   Footings undermined
Waikapu Bridge 5-6 ft degradation  based on 1935 as-builts Countermeasure  options:   Grout injection   Re-establish g...
Waimea River Bridge (Oahu)   Built in 1928   100-Yr Discharge: 12,440 cfs   Sand and Silt Bed   Multiple Piers and Piles
Waimea River Bridge                  Pier 2 Undermined                  Damage to Riprap at                   Abutments ...
Step 5.Prepare Scour Plan of Action Template – Caltrans Additions         Illinois DOT, FHWA Customized for    Hawaii ...
Scour POA Form Sections1.    Scour Vulnerability2.    NBIS Coding Information3.    Recommended Action(s)4.    Hydraulic/St...
Scour POA – Recommended Actions
Scour POA – Bridge Closure Critical Scour Elevations Provides Guidance to HDOT Personnel
Scour POA – Detour Route          Hana Highway
Scour POA – Bridge Scour Schematic
Questions?Contact Info:Kurt Baron, GISPWEST Consultants, Inc.kbaron@westconsultants.com(858) 487-9378
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Actio...
Upcoming SlideShare
Loading in …5
×

Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Action for Hawaiian Bridges - Hydrologic and Hydraulic Analysis using ArcGIS, Arc Hydro, and HEC-GeoRAS

1,479 views

Published on

Published in: Technology, Travel
  • Be the first to comment

  • Be the first to like this

Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response I - Preparing Scour Critical Plans of Action for Hawaiian Bridges - Hydrologic and Hydraulic Analysis using ArcGIS, Arc Hydro, and HEC-GeoRAS

  1. 1. HYDROLOGIC AND HYDRAULIC ANALYSIS USING ARCGIS, ARC HYDRO, AND HEC-GEORAS Kurt Baron, GISP, WEST Consultants, Inc. A. Jake Gusman, P.E., WEST Consultants, Inc. Christine Warren, P.E., WEST Consultants, Inc. Martin J. Teal, P.E., P.H., WEST Consultants, Inc. Mike Hunnemann, P.E., KAI Hawaii Inc. Curtis Matsuda, P.E., Hawaii DOT
  2. 2. Scour POA Development1. Estimate Peak Discharges2. Perform Field Reconnaissance3. Create Hydraulic Model & Compute Scour4. Develop Scour Countermeasures5. Prepare Scour Plan of Action Lumahai River Bridge (Kauai)
  3. 3. Scour Critical Bridges - Hawaii 56 Hawaiian Bridges Identified as Scour Critical:  21 on Oahu  13 on the Big Island  10 on Maui  10 on Kauai  2 on Molokai Drainage Areas: 0.2 mi2 to 250 mi2 Many within 500 ft of the ocean Oahu
  4. 4. Maui Big IslandMolokai Kauai
  5. 5. Step 1.Estimate Peak Discharges Flood-frequency analysis USGS regression equations Available peak discharges (FEMA, Corps) Maui Big Island
  6. 6. Data: Software: National Bridge  ArcGIS, Spatial Analyst, Inventory 3D Analyst DEM  Arc Hydro Streams  Google Earth Imagery Rainfall Available stream gage locations and data
  7. 7. Step 1. Estimate Peak Discharges Flood-Frequency Analysis  Regression Equations (~30% of Bridges) (New in 2010)
  8. 8. •50-foot DEM•Streams layer•Mean annual rainfall•Arc Hydro
  9. 9. Kauai ScourCritical BridgeWatershedsMt. Wai‘ale‘ale:450 to 500inches per year! Wailua River DA = 53 mi2 Q100: 104,000 cfs
  10. 10. Step 2.Perform Field Reconnaissance  Obtained As-builts  Customized Field Form  Field Recon Team:  Structural Engineer  Hydraulic Engineer  Geotechnical Engineer
  11. 11. Field Form
  12. 12. Field Form(cont’d) Mauka = toward the mountains, inland Makai = toward the sea
  13. 13. Vertical Datum?Field Form(cont’d)
  14. 14. Local Fish& Wildlife(foundunder thebridges)
  15. 15. Hakalau Bridge Built in 1953  Sand with surface gravel 100-Yr Discharge is 5,710 cfs  170-ft high deck
  16. 16. Hakalau Bridge
  17. 17. Step 3.Create Hydraulic Model &Compute Scour  HEC-RAS  HEC-18 scour  NCHRP reports
  18. 18. Data: Software: Intermap IfSAR DTM  ArcGIS, Spatial Analyst, v1.5 3D Analyst NED DEM 10-meter  HEC-GeoRAS Hillshade models  HEC-RAS Contours Imagery As-built bridge plans
  19. 19. •Intermap IfSAR DTM v1.5•Coastal Geology Group Imagery•HEC-GeoRAS
  20. 20. Wailuku River Bridge Flood flows (Q100: 135,000 cfs) and tsunami bores Tsunamis occurred in 1946 (Aleutian Islands earthquake), 1960 (Chilean quake) 1960 Tsunami (USGS)
  21. 21. Wailuku River Bridge& Tsunami Path USGS
  22. 22. Step 4.Develop Scour Countermeasures& Recommend Actions Hydraulic/Structural Countermeasures:  Riprap Relief bridge / culvert  Spurs/ Bendway weirs/ Barbs Substructure modification  Drop structure Recommend bridge replacement  Channel improvements Increased inspection frequency Scour monitoring devices Flood monitoring plan
  23. 23. Waikapu Bridge  Built in 1937  100-Yr Discharge: 1,180 cfs  Boulders and bedrock  Footings undermined
  24. 24. Waikapu Bridge 5-6 ft degradation based on 1935 as-builts Countermeasure options:  Grout injection  Re-establish grade at downstream end  Drop structure
  25. 25. Waimea River Bridge (Oahu) Built in 1928 100-Yr Discharge: 12,440 cfs Sand and Silt Bed Multiple Piers and Piles
  26. 26. Waimea River Bridge  Pier 2 Undermined  Damage to Riprap at Abutments  Debris in Channel  Proposed Countermeasures: 12 ft  Repair Existing Riprap  Riprap Base of Piers  Remove Debris
  27. 27. Step 5.Prepare Scour Plan of Action Template – Caltrans Additions  Illinois DOT, FHWA Customized for Hawaii DOT
  28. 28. Scour POA Form Sections1. Scour Vulnerability2. NBIS Coding Information3. Recommended Action(s)4. Hydraulic/Structural Countermeasures5. Inspection Frequency6. Monitoring Devices7. Flood Monitoring Plan8. Bridge Closure Plan9. Detour Route10. Bridge Scour Schematic
  29. 29. Scour POA – Recommended Actions
  30. 30. Scour POA – Bridge Closure Critical Scour Elevations Provides Guidance to HDOT Personnel
  31. 31. Scour POA – Detour Route Hana Highway
  32. 32. Scour POA – Bridge Scour Schematic
  33. 33. Questions?Contact Info:Kurt Baron, GISPWEST Consultants, Inc.kbaron@westconsultants.com(858) 487-9378

×