Study of Surface Evaporation Currents Due to Wind-Induced in Aquatic Canopy Areaswith Floating Vegetation

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Heshmati Far, Amir | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47256 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Jamali, Mirmosaddegh
Abstract:
The aquatic canopy areas such as wetlands play an important role in ecology of these area. The exchange flow between open water and vegetated area occurs due to sunlight and surface cooling. Wind also causes surface evaporation and create a cold layer at the surface of water. The creation of exchange flow and its magnitude depends on parameters like solid volume fraction and thermal gradient. In this thesis, the goal is to determine the effects of floating vegetation on the hydrodynamic characteristics of exchange flowas a result of surface cooling experimentally. In this research, the PIV method was used to measure velocity profiles. In the experiments, solid volume fraction, depth of floating vegetation, and heat negative flux varied. It is found that the drag of the canopy area is the most important factor affecting the exchange flow. When root depth is small, the intrusion flow transfers to beneath of the root layer and when the root depth increases, the intrusion flow moves into the root layer.The experimental results was compared to the results of the scale analysis
Keywords:
Pulsating Flow ; Wind Blowing ; Floating Vegetation ; Experimental Modeling ; Analytical Solution ; Surface Cooling ; Surface Evaporation ; Fundamental Solution

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