A Study Of Spatiotemporal Evolvement And Scale Effects On Urban Thermal Environment In Fuzhou Basin

With the quickening proceeding of industrialization and urbanization, the issue of urban thermal environment becomes a more serious problem. It has great impact on urban micro-climate, urban air quality, the comfort level of human inhabitation and so on. The system of urban thermal environment is so heterogeneous and complex that the traditional statistic methods become insufficient to its research, so a new method must be introduced to perfect previous means.Fuzhou basin was chosen as study area. All necessary datas such as LST, land use types and topographic parameters were obtained from various of datas which were able to be collected and processed by the support of GIS and RS technology. The thought and methods from relevant subject such as LUCC, Landscape ecology and Geostatistics were attempt to be introduced, they were aimed to analysis the different aspects of urban thermal environment, including spatial patterns, rules of spatiotemporal evolvement and scale effects.The research results show that the spatial patterns of urban thermal environment in study area were not only affected by the local topographic parameters, but also related to spatial patterns and changes of land use types. The spatial differences of LST were increasing during the study period which was from 1994 to 2001. The partial heat quantity was assembling obviously and the heat effects of urban thermal environment had a worse trend. Both the spatial autocorrelation to the distribution of LST and random factors had great impact on spatial heterogeneity of the distribution of LST. The spatial patterns of urban thermal environment had obvious scale effects as a result of the changing scales.