Research on the making factor of the heat island in the early-morning of Kumagaya

摘要

Heat island phenomenon is considered one of serious problems that have been developed due to the concentrations of human activities in urban areas, which caused unbalance in the heat budget.In this study, spatial-correlation analysis was identified between temperature and many parameters that seem to affect the heat island phenomenon of Kumagaya city. The parameters used in the analysis are NDVI, thermal characteristic value and form of the buildings, and the latter consist of three parameters: two-dimensional building density, three-dimensional building density and roughness-parameter. The results showed that there was a low correlation in temperature with all parameters, but on the other hand, a clear relationship was found between land use and temperature. Moreover, the results indicated that the form of buildings in urban area blocks the cool-down effect of the river to penetrate to the urban area.