Title:

Efficacy of Bubble Screens on Turbidity Control

This project aims to test the efficacy of bubble screens in deferring a density current with the goal of understanding if they are a viable substitute for silt curtains. Silt curtains are currently used to control turbidity levels during dredging and pose technical and environmental problems. Experimentation involved a tank that was designed and constructed with a lock mechanism that was released to create a density current. A bubble screen was created through a pneumatic system that allowed air to flow out of small holes in PVC tubing. A density current was formed by allowing the higher density current to flow toward fresh water with release of the lock. Quantitative data was extracted from flow visualization methods during the experiment to determine how effective the bubble screen was at containing a density current. Qualitative analysis was conducted on how well the bubble screen could prevent mixing between the two fluids.

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