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Coastal Observing R&D CenterScripps Institution of Oceanography

Emerging Technologies for Ocean Sampling

Peter Rogowski, Eric TerrillScripps Institution of Oceanography – UCSD

Coastal Observing R&D CenterScripps Institution of Oceanography Autonomous Applications

• Leverage highly maneuverable and sensor rich unmanned vehicles for process studies and hypothesis testing

• Unmanned Underwater Vehicles (eg. REMUS 100, 600)

• Unmanned Aerial Systems (multirotors, both tethered and free-flying)

• Examples: air-sea interaction, optics, turbulence, other

Coastal Observing R&D CenterScripps Institution of Oceanography Autonomous Applications

Coastal Observing R&D CenterScripps Institution of Oceanography Ocean Plume Sampling

Coastal Observing R&D CenterScripps Institution of Oceanography

Instrumentation:

• ADCP (RDI)• Temperature Chain

(Precision Measurement Engineering)• Self Contained Temperature &

Salinity Sensor (Seabird)

• Data Logger (Scripps)

• Iridium Satellite Telemetry Unit

• GPS Receiver

Supplemental Monitoring

Coastal Observing R&D CenterScripps Institution of Oceanography Point Loma Ocean Outfall Survey Examples

August, 3, 2010 February, 28, 2010

* CDOM is used as a natural tracer

Coastal Observing R&D CenterScripps Institution of Oceanography CDOM Calibration

Coastal Observing R&D CenterScripps Institution of Oceanography

CDOM > 4.1

• Additional plume rise and mixing seen in 2/28/2011 survey was due to internal waves propagating through the study area.

Survey Examples

Coastal Observing R&D CenterScripps Institution of Oceanography Vertical Plume Distribution

Coastal Observing R&D CenterScripps Institution of Oceanography

Observed Plume Height vs Modeled Plume Height (NRfield Plume Model)

Vertical Plume Distribution

Coastal Observing R&D CenterScripps Institution of Oceanography Recommendations

Recommendations:

• Dedicated mooring near outfall formonitoring of stratification and subsurfacecurrents of receiving waters.

• Optimize sampling locations for quarterlywater quality sampling based on subsurfacecurrent data.

• Routine (i.e. monthly) AUV sampling ofeffluent plume to measure plume locationand dilution.

OCSD Diversion Summary (September 2012)

Coastal Observing R&D CenterScripps Institution of Oceanography

9/28/2012 (5 – 10 m)

OCSD Diversion (September 2012)

Coastal Observing R&D CenterScripps Institution of Oceanography

CDOM Profile Summary (Far-Field)Transect Spacing ~ 1kmMission Start: 8:37 ESTMission End: 14:02 EST

OCSD Diversion (September 2012)

Coastal Observing R&D CenterScripps Institution of Oceanography

CDOM(ppb)

OCSD Diversion (September 2012)

Surface Current Mapping through HF Radar

Coastal Observing R&D CenterScripps Institution of Oceanography

TRAJECTORY ANALYSES OF COASTAL DISCHARGE PLUMES

Coastal Observing R&D CenterScripps Institution of Oceanography Probability Exposure Maps

Coastal Observing R&D CenterScripps Institution of Oceanography Lake Jennings Tracer Study (Fall 2017)

Coastal Observing R&D CenterScripps Institution of Oceanography Lake Jennings Tracer Study (Fall 2017)

Rhodamine

Temperature

Coastal Observing R&D CenterScripps Institution of Oceanography