Study On The Influence Of Ecological Patches On Urban Microclimate

In recent years,the economic development has prompted China's urbanization trend to accelerate significantly.In 2017,China's urbanization rate has exceeded 58%.The increase of urban population and the increase of construction land have made the contradiction between man and land more serious.Since the 20 th century,nearly 50% of global ecological wetlands have disappeared,and more than half of the world's rivers have been destroyed.Forests,tropical rain forests,farmland and other ecological land have suffered from land.The effects of degradation.The city's high-intensity development,high-density buildings,and high-aggregation crowds have caused large areas of ecological land in the city to disappear,and the natural regulation of the city has been destroyed.These changes have caused urban temperatures to rise and the heat island phenomenon has increased.Taking Wuhan as an example,the growth of urbanization and construction land has caused the temperature in Wuhan to rise continuously.From 1965 to 2005,the annual average temperature in Wuhan increased by about 4 °C.Urban dwellers will be exposed to a variety of threats caused by changes in the climate: including harsh climates,rising sea levels,public health,poor air quality and lack of water.Studying the relationship between urban microclimate and ecological land and urban spatial structure under regional conditions,how to positively regulate urban microclimate will become an important research direction for urban sustainable development,and it is also an urgent research topic in urban environment and planning.This paper takes Wuhan as a simulation case,starting from the status quo of Wuhan's development,that is,the level of urbanization is gradually rising,the construction land is expanding,and the ecological land area is greatly reduced.This is further combined with the rising temperature in Wuhan and the increasingly severe climate of the heat island.The characteristics of change,through computer simulation,get the microclimate status of different ecological plaque cases.By analyzing the numerical indicators of different ecological patches,the influence of the changes of land attributes of ecological patches on urban microclimates is discussed,and the effects of different ecological patches on urban microclimate are analyzed,so that they can be targeted to the urbanization of Wuhan.The ecological construction problem gives theoretical guidance and suggestions.Promote the sound development of ecological land and urban climate in the context of the continuous development of urban land demand.This paper draws on the impact of different ecological land on urban climate,and explores urban meteorological quantitative indicators based on land use,provides scientific basis for the location of ecological patches,and provides data support for urban planning.It is proposed to improve the urban microclimate by selecting the layout of different types of ecological patches,which has scientific significance for the rational planning of the city.