Engineering Surveys & KGPS

Outline Problem Example Applications / uses of KGPS Project Example

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

Navigation Channel Dredging Engineering & Construction Applications Dredge“Stuyvesant”

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

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

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

Beach Profile Surveys Construction Measurement & Payment Control Baseline Beach profile lines spaced ft c/c (typical) Ft Pierce, Florida Jacksonville District Typical disparity between topo and acoustic surveys

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 Topo Profile Hydro Profile

Beach Renourishment Typical Section for Construction Measurement & Payment

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

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

Electronic Chart Data benefiting safety of navigation  Inland  Coastal Inland Electronic Navigational Chart

Hydrographic Surveys of Shallow Wetland Areas

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

Project Example

Regional Sediment Management