2. 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 top 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 flow as a result of surface cooling. In this experiments parameters of
solid volume fraction, depth of floating vegetation and heat negative flux have been diverse. In
this research, the PIV method was used to measure velocity profiles. It is found that the drag
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 experiments was performed for investigation of the heat transfer in calibration tank. Then,
the experimental results was compared to the analytical and the fundamental results. There is a
good likeness between above-mentioned outcomes in further experiments.
Keywords: Exchange flow, Wind, Surface cooling, Surface evaporation, Floating
vegetation, Experimental model, Analytical solution, Fundamental Solution.