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Experimental study and environmental economic benefit analysis on Urban heat island mitigation based on low impact development

Jiping Wang, Qiongsong Li

Experiments on spot, surface temperature monitoring experiments through the different road surface with the traditional flat roof and ecological roof were implemented and the results were used to quantize the cooling effect of these LID measures. The environmental benefits and economic benefits from temperature lowing were estimated subsequently. The innovation points mainly have two aspects. First, A new concept based on Low Impact Development (LID) strategies for sustainable development to alleviate the Urban Heat Island (UHI) effect has been put forward firstly compared with traditional views. Second, the effective efficiency of LID measures mitigation heat island effect was quantified. Results show that permeable pavement, lawn ground and ecological roof can help cool the surface temperature. Permeable pavements, green landscapes and ecological roofs can build beautiful landscapes, adjust the temperature, and form natural air conditioning which is beneficial to improve the air quality. On the other hand, when applying the UHI effect mitigation measures, if the temperature dropped 1 ~ 1. 5 oC, a considerable amount of electric power resources had been saved. These findings could be used as a reference for UHI mitigation strategies and have certain application prospect.