Study on the Urban thermal Environment and Modelling

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A numerical model which can compute air temperature, specific humidity and wind velocity distribution within a single district of few square kilometers was developed by adding the effect of urban building and the forest canopies to a mesoscale turbulent closure model. The effects of anthropogenic heat are also accounted for in the model. The new model was tested with different kinds of canopies. Results of computations indicated that temperatures of the ground surface and walls of buildings depend much on the building density. The validation of the model, conducted using observational data, indicates that the model is capable of computing the wind velocity and air temperature in the urban area with resonable accuracy. The comparison of the results of the new model with existing models on the urban climate indicates that the new model can produces more realistic results.