An analysis on spatial variation of urban human thermal comfort in Hangzhou, China.
Urban human thermal comfort (UHTC) is affected for interacting of weather condition and underlying surface framework of urban area. Urban underlying surface temperature value and Normalized Difference Vegetation Index (NDVI) were calculated using image interpreting and supervised classification technique by ERDAS IMAGE software using 1991 and 1999 Landsat TM images data. Reference to the relational standard of assessing human thermal comfort and other meteorology data of Hangzhou City in summer, air temperature and relative humidity variation of different land types of underlying surface were inversed. By choosing discomfort index as an indictor, the spatial distribution characteristic and the spatial variation degree of UHTC were estimated and mapped on a middle scale, that is, in six districts of Hangzhou. The main characteristics of UHTC spatial variation from 1991 to 1999 were revealed using a GIS-based calculation model. The variation mechanism were analyzed and discussed from the viewpoint of city planning, construction and environmental protection.
Wang
Wei-wu
WW
College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China. wwwang@hzcnc.com
Zhu
Li-zhong
LZ
Wang
Ren-chao
RC
D002681:China; D002958:City Planning; D002980:Climate; D004779:Environment Design; D004784:Environmental Monitoring / Q000379:methods*; D040362:Geographic Information Systems; D006358:Hot Temperature; D006813:Humidity; D013696:Temperature; D014504:Urban Health; D014505:Urban Population