Model Experiment For Transport Of Heat, WaterAnd Vapor Within The Soil-plant-atmosphereSystem And Its Numerical Simulation Model

The earth’s surface has been changed with the advancement of urbanization and deforestation in recent years. As a result of these artificial or natural alterations of the surface, it has been suggested in many fields that the microclimate near the surface has been changed because of the variation of momentum, latent and sensible heat fluxes. It is very important therefore to predict the change of microclimate near the surface, not only for the analysis of local climate like the heat island phenomena and air pollution in urban areas but also for climate change predictions on a global scale. In these backgrounds, it is necessary to understand in detail and construct the prediction model for the transport of heat, water vapor and momentum in the air and soil near the surface. In this paper, we conduct two model experiments and compare these results with those of a simulation model (The multi-layer soil-plant-atmosphere model). One is an evaporation experiment from bare soil using a column container with a depth of 650mm and a diameter of 200mm. The other considers an experimentally planted azalea in the same size column. It is shown from these evaluations that the numerical model we employed can reasonably well predict the behaviour of variables within the soil-plant-atmosphere system.