USACE Field Research Facility

Brunswick Project

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Descriptions

News/Schedule
of events

  Data
   •Fixed
      instrumentation
      sites
   •Tracer
      experiment
   •Surveys
   •Cruises
   •Other Sources

Bathymetric Surveys Index: Schedule of Events Products Scope of Work Click to enlarge	Boundaries for surveying. Small blue boxes for quarterly surveying, larger blue boxes for one-time surveying at coarser resolution.
Products(most recent at top) FEB 2-8, 2003 Completed first survey. Initial survey of Box C by dredger. Preliminary surveys for planning purposes.
Scope of Work To implement the models and understand the effect of the processes on the mound(s), and tracer material, it is essential that accurate bathymetric surveys be conducted. The approach will be to complete a survey of the model domain followed by repetitive surveys of the mound and disposal sites, as shown in Figure 4. The domain survey, ‘JEK coarse’ and ‘ABC coarse,’ should be sufficient to develop coarse 200x200m grids. The repetitive surveys of the smaller areas, ‘JEK fine,’ ‘B fine,’ and ‘C fine,’ should be sufficiently resolved to develop a fine 25x25m grid. State of the art in bathymetric surveying should be used to provide the maximum accuracy. This should include Real-Time Kinematic (RTK) GPS, a Knudsen BP320 echo sounder, and HYPACK data acquisition software or equivalent hardware and software. Frequent CTD profiles should be obtained throughout the day when surveying. These data should be used to correct the speed of sound from the echo sounders.All CTD data should be provided as part of the survey results. Charts and ASCII data file(s) containing x,y,z in meters, referenced to state plane NAD83 and NAVD88 datums will be provided. After the second survey is completed, change maps showing bathymetric differences between surveys will also be provided.