PULSAR SURVEYS (AO & GBT) Why? How deep can we go? (D max, V max ) Example surveys Hardware Funding.
Engineering Surveys & KGPS. Outline Problem Example Applications / uses of KGPS Project Example.
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Transcript of Engineering Surveys & KGPS. Outline Problem Example Applications / uses of KGPS Project Example.
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Engineering Surveys & KGPS
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Outline
• Problem Example• Applications / uses of KGPS• Project Example
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Red > 100M tons Green 20M – 100M tons Blue < 20M tons
Inland Waterways
~ 15,000 miles
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Navigation Channel DredgingEngineering & Construction Applications
Dredge“Stuyvesant”
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Dredge Payment Surveys
Sections must extendoutside channel toeto fully develop side slope(150 to 200 ft typical)
Cross-sectionsspaced 100 ftor 200 ft C/C
40x300 ft channel
DREDGE PAYMENT SURVEYS
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Dredge Measurement & Payment Survey
TIN
3-D Model
Volume computations
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Dredged Material Placement Area
Offshore SubmergentDisposal Area Surveys
Emergent or UplandDisposal AreaConstruction Surveys Tampa Bay
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Beach Profile Surveys Construction Measurement & Payment
ControlBaseline Beach profile
lines spaced200-500 ft c/c (typical)
Ft Pierce, Florida Jacksonville District
Typical disparity between topo and acoustic surveys
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Rod & Transit and RTK Techniques
vertical accuracy: +/-1 cm to +/- 10 cmhorizontal accuracy: 0.1 to 3 meters RMSspatial resolution: typically shore-normal lines 300 m (1000 ft) apart positioning system: ranging/ETS relative to established benchmarksminimum crew: 2cost: about $1000/Km ($1600/mile) of
beach assuming 300-m profile spacing
TopoProfile Hydro
Profile
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Beach RenourishmentTypical Section for Construction Measurement & Payment
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Jetty & Breakwater Surveys & Cross-Sections
Topo/hydro sectionsrun 25 to 50 ft C/C
Jetty control baselineHubs set 25 to 50 ft C/C
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0 m 3 m 6 m 9 m 12 m 15 m depth in meters
pipeline
Joint Airborne Lidar Bathymetry Technical Center of Expertise
Niagara River
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Electronic Chart Data Electronic Chart Data benefiting safety of benefiting safety of navigationnavigation InlandInland CoastalCoastal
Inland Electronic Navigational Chart
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Hydrographic Surveys of Shallow Wetland Areas
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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
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Project Example
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Regional Sediment Management