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Related Concept Videos

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In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
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Related Experiment Video

Updated: May 15, 2026

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Ocean outfall plume characterization using an Autonomous Underwater Vehicle.

Peter Rogowski1, Eric Terrill, Mark Otero

  • 1Scripps Institution of Oceanography, La Jolla, CA 92093-0213, USA. progowski@ucsd.edu

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|January 12, 2013
PubMed
Summary

Autonomous Underwater Vehicles (AUVs) equipped with Colored Dissolved Organic Matter (CDOM) sensors can effectively map wastewater plumes. This advanced AUV technology offers higher resolution plume characterization than traditional methods.

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Area of Science:

  • Oceanography
  • Environmental Science
  • Marine Biology

Background:

  • Ocean outfalls are critical for wastewater management.
  • Traditional monitoring methods like cast-based techniques have limitations in plume characterization.
  • Understanding wastewater plume dynamics is essential for environmental protection.

Purpose of the Study:

  • To map and characterize the Point Loma Ocean Outfall (PLOO) wastewater plume.
  • To evaluate the effectiveness of Autonomous Underwater Vehicles (AUVs) for plume monitoring.
  • To assess the utility of Colored Dissolved Organic Matter (CDOM) for quantifying plume dilution.

Main Methods:

  • Deployment of an AUV equipped with optical and oceanographic sensors.
  • Measurement of Colored Dissolved Organic Matter (CDOM) within the wastewater plume.
  • Comparison of AUV observational data with model results.

Main Results:

  • AUVs provide enhanced mobility and data resolution for plume surveying.
  • CDOM measurements enabled quantitative estimates of plume dilution.
  • AUV-based monitoring proved more effective than traditional cast-based methods, even in variable oceanic conditions.

Conclusions:

  • AUVs equipped with CDOM sensors offer a superior method for characterizing ocean outfall plumes.
  • Properly planned AUV missions provide high-resolution data for plume tracking and assessment.
  • This technology aids in understanding wastewater mixing and environmental impact.