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Engineering Surveys & KGPS

Engineering Surveys & KGPS. Outline. Problem Example Applications / uses of KGPS Project Example. Inland Waterways. Red > 100M tons Green 20M – 100M tons Blue < 20M tons. ~ 15,000 miles. Navigation Channel Dredging Engineering & Construction Applications. Dredge“Stuyvesant”.

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Engineering Surveys & KGPS

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  1. Engineering Surveys & KGPS

  2. Outline • Problem Example • Applications / uses of KGPS • Project Example

  3. Inland Waterways Red > 100M tons Green 20M – 100M tons Blue < 20M tons ~ 15,000 miles

  4. Navigation Channel DredgingEngineering & Construction Applications Dredge“Stuyvesant”

  5. Dredge Payment Surveys DREDGE PAYMENT SURVEYS Cross-sections spaced 100 ft or 200 ft C/C Sections must extend outside channel toe to fully develop side slope (150 to 200 ft typical) 40x300 ft channel

  6. Dredge Measurement & Payment Survey TIN Volume computations 3-D Model

  7. Dredged Material Placement Area Offshore Submergent Disposal Area Surveys Emergent or Upland Disposal Area Construction Surveys Tampa Bay

  8. Beach Profile SurveysConstruction Measurement & Payment Ft Pierce, Florida Jacksonville District Control Baseline Beach profile lines spaced 200-500 ft c/c (typical) Typical disparity between topo and acoustic surveys

  9. Topo Profile Hydro Profile Rod & Transit and RTK Techniques vertical accuracy: +/-1 cm to +/- 10 cm horizontal accuracy: 0.1 to 3 meters RMS spatial resolution: typically shore-normal lines 300 m (1000 ft) apart positioning system: ranging/ETS relative to established benchmarks minimum crew: 2 cost: about $1000/Km ($1600/mile) of beach assuming 300-m profile spacing

  10. Beach RenourishmentTypical Section for Construction Measurement & Payment

  11. Jetty & Breakwater Surveys & Cross-Sections Jetty control baseline Hubs set 25 to 50 ft C/C Topo/hydro sections run 25 to 50 ft C/C

  12. pipeline Niagara River 0 m 3 m 6 m 9 m 12 m 15 m depth in meters Joint Airborne Lidar Bathymetry Technical Center of Expertise

  13. Inland Electronic Navigational Chart • Electronic Chart Data benefiting safety of navigation • Inland • Coastal

  14. Hydrographic Surveys of Shallow Wetland Areas

  15. KGPS Uses in R&D Obtain basic hydrography for design guidance of depth & width of coastal navigation channels Use of numerically derived risk-based probabilistic channel sizing … reduce over-conservative channel design

  16. Project Example

  17. Regional Sediment Management

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