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Consume a lot of energy has caused serious environmental problems of air pollution, global warming, urban heat island effect, the ecological environment deteriorating. Deteriorating urban environment, growing the urban heat island effect, but also strengthened the desire of the people to adhere to the path of sustainable development, demand strengthens looking for a rational and efficient urban heat island mitigation strategy. This thesis aims to analyze urban development at home and abroad, on the basis of the status quo of the evolution of the heat island, summarize the technical means of the urban heat island mitigation, urban heat island mitigation proposed urban scale and neighborhood scale quantitative modeling methods, and on this basis, the establishment of the city Heat Island Mitigation effective evaluation system to be able to establish the urban heat island mitigation strategies and urban heat island mitigation relationship between effective mitigation of urban heat island, and the improvement of the urban heat environment, urban energy conservation and related fields such as urban planning and management have some guidance and reference, and to provide a scientific basis and technical guidance for human habitation, living, working, recreation and other environmental improvements. This paper described the mechanism of urban land use change, natural reduction in the underlying surface, urban anthropogenic heat emissions generated by the urban heat island, which launched the urban heat island mitigation strategies; summarizes the more common use of the city heat island mitigation techniques, including trees, vegetation, green roofs, cool roofs, pavement cooling. Secondly, on the basis of the urban heat island produces the mechanism and the urban heat island mitigation strategy analysis of different scales urban heat island mitigation of quantitative simulation studies, mainly including the urban scale and neighborhood-scale urban heat island mitigation of quantitative simulation study . The results show that the urban scale, urban heat island mitigation the major anthropogenic controllable factors, including vegetation index, surface albedo, building density, floor area ratio and building height correlation size sort: NDVI gt; surface albedo gt; the building density gt; building height gt; volume rate; neighborhood scale, three-dimensional distribution of the urban heat environment influenced by the surface material, the ratio of building height spacing, building enclosure, especially in the vertical direction with the different storey, the main factors of the temperature and distribution changes. Third, the urban heat island mitigation on the basis of quantitative modeling to select different scales of urban heat island mitigation effectiveness evaluation factors, including the economic benefits evaluation factors (energy savings, cost savings value, etc.) and social benefits evaluation factor (human comfort, work level of efficiency, health, disaster frequency, etc.), the use of the analytic hierarchy process, comparative analysis of the economic and social benefits of the different scales in different urban heat island mitigation strategies can be generated. Finally, select the summer the Hangzhou West certain range (221.16km2) of the study area as a case study, the results show that, by volume rate does not change within the scope of the study area, the increased vegetation index (0.01), within the scope of the study, surface albedo (0.05 ), average building height (30) and lower building density (-6); does not change the surface albedo within the scope of the study and building density, increase research within vegetation index (0.09), the average building height (25), as well as reduce the floor area ratio (-0.5) and three different heat island mitigation measures, can reach temperatures dropped 1.28 ° C; energy consumption savings of 3.41 × 108kJ; electricity demand savings of 16.81 × 104kwh and electricity cost savings is 12,563,900 yuan slow Less effective. Articles through quantitative modeling of heat island mitigation and benefit evaluation based on quantitative modeling estimates obtained in urban planning or construction, can change a human controllable factors, such as vegetation index, surface albedo, volume rate, in order to reach the city heat island mitigation benefits, and generate considerable economic benefits, to achieve a \platoon and humans contribute to sustainable development.
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