MA1 Assesssment of Urban Wins Encvironment (Organized session)

In Japan, a new assessment system called CASBEE-HI (Comprehensive Assessment System for Building Environmental Efficiency on Heat Island Relaxation) has been developed for evaluation of the effects of various building design-related measures for heat island reduction.To assist the evaluator to examine the wind environment, a wind environment database was developed.In the present paper, a wind environment database for the special 23 wards of Tokyo is described as an example.The present Tokyo database includes results of threedimensional (3D) CFD analysis in which all the existing buildings in the special 23 wards of Tokyo are reproduced in 3D geometries in a grid network of approximately 500,000,000 meshes with a spatial resolution of 8 m in the horizontal directions.