Effects of Marsh Grass on Diffusivity
نویسندگان
چکیده
The hydrodynamic processes associated with flow through vegetation have many implications for both natural and constructed wetlands. This study examined the effect of marsh grass on mixing rates. A flow visualization study was performed, using a laser light sheet and a video camera to obtain images of a plume of fluorescent dye. The study was performed in a laboratory flume, using wooden dowels to simulate plant obstructions. The effect of different densities of plants was studied, and a basic mechanical model was produced to describe the effects of the obstruction. It was found that plant/dowel density had a significant effect on mixing, an effect that is important to the function of marsh grass both as part of a wetland ecosystem and as a natural filtering system for wastewater. Thesis Supervisor: Heidi M. Nepf Title: Assistant Professor
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