Planning Mitigation Countermeasures Of City Blocks Heat Island Effect

Urban heat island effect (UH1) is the Prominent Phenomenon of human activities on climate. With the rapid advance of urbanization in China, urban heat island has become increasingly evident, which brings many threats to atmospheric environment, creature activities and human health and so on, as well as consumes a great amount of energy. Therefore, making quantitative and qualitative research on UHI will help Prevent urban environment degeneration, reduce energy consumption and realize the sustainable development of human dwelling environrnent.As an integral unit of urban, how Can we ameliorate the heat island effect in block, improving the living comfort and achieving energy。 saving has become a common concern among the block developers, designers and residents and an important part of UHI research. City blocks heat island effect is the combined results of natural and human factors including urban climate, spatial layout, underlying, Involving fields of study in multidisciplinary.So based on the previous study, the paper studied the spatial forming mechanism of UHI and planning mitigation countermeasures both theoretically and practically, and proved part of the theory by taking Yue hua Walking Street of Xiang tang city as an example.In theory, first, the paper analyzed the spatial forming mechanism. On block scale, block surface cover, block form, street canyon are factors influencing UHI.Then, the paper put forward planning mitigation countermeasures.In the case study, the paper puts forward corresponding measures in how to optimize design stage and relieve heat island effect from the conceptual level. Final, after implementing these mitigation measures, simulating with CFD software which proved and deepened part of the former theory discussion.