An analysis on spatial variation of urban human thermal comfort in Hangzhou, China
摘要
Urban human thermal comfort (UHTC) is affected for interacting of weather condition and underlyingsurface framework of urban area. Urban underlying surface temperature value and Normalized Difference VegetationIndex(NDVI) were calculated using image interpreting and supervised classification technique by ERDAS IMAGEsoftware using 1991 and 1999 Landsat TM images data. Reference to the relational standard of assessing humanthermal comfort and other meteorology data of Hangzhou City in summer, air temperature and relative humidityvariation of different land types of underlying surface were inversed. By choosing discomfort index as an indictor, thespatial distribution characteristic and the spatial variation degree of UHTC were estimated and mapped on a middlescale, that is, in six districts of Hangzhou. The main characteristics of UHTC spatial variation from 1991 to 1999 wererevealed using a GIS-based calculation model. The variation mechanism were analyzed and discussed from theviewpoint of city planning, construction and environmental protection.