Study On The Impact Of Ecological Patch On Urban Climate Environment In Winter And Summer

At present,our cities are entering a stage of deep development.According to the Population Statistics,by the end of 2018,the urbanization rate of permanent urban residents in China had reached 59.58%.With the increase of urban population and the expansion of construction land,the contradiction between human and land is serious,and the natural undersurface of the city is replaced by artificial undersurface.Since the20 th century,nearly 50% of the global ecological wetlands have disappeared,A large amount of vegetation,farmland,wetlands and other ecological land has been destroyed,and more than half of the world's rivers have been disturbed and damaged by human activities.With the increase of artificial urban underlying surface and the decline of large area of ecological land,the natural regulation function of urban climate is seriously affected,and the abnormal climate such as urban hot and cold island effect,urban haze effect and urban air pollution gradually appear,which brings many adverse effects on the life of urban residents.Taking Wuhan as an example,along with the economic development,the urban environment has been greatly affected.The AQI value of Wuhan was polluted 69.2% of the time from 2014 to 2015.And from 1965 to 2005,the average temperature in Wuhan increased about 4?.In recent years,a series of ecological and environmental problems,such as tropical island effect,poor air quality,lack of water resources,occupation of farmland and reduction of water and lake area,have appeared in the urban climate of Wuhan.How will we respond to the growing problems? The author believes that the study of urban microclimate under regional conditions,and the relationship between urban ecological land and spatial structure to improve urban microclimate,is the only way for the sustainable development of the environment in the future,and is also the research direction for experts and scholars.As wuhan city to simulate case,with the present situation of urban development,namely wuhan urbanization development level?the status of population growth?the present situation of urban construction land?the urban land use and ecological land area to reduce,then combined with the feature of local climate change in wuhan city,east lake area to simulate plaques,Change the original patch attributes to: farmland mixed plaques,wetland vegetation plaque,forest land,construction land(no patches),and then through a lot of computer simulation calculation,it is concluded that different ecological plaques in the temperature?air?water?the surface energy of the numerical results.At the same time,through the analysis of the different ecological plaque to simulate index of the experimental results,we can know the ecological plaque on the city climate regulation have some influence,in order to the wuhan urban development put forward some Suggestions on solving the local ecological environment and the effective method.In this paper,the author simulated and studied different ecological patches and land use conditions,mainly trying to explore and find a quantitative index of urban meteorology based on urban land use,as to provide effective data for reference for specific regulation work such as urban planning and ecological patch site selection in future urban development.In the context of the ever-expanding demand for urban land,the data obtained in this study prove that the proper layout of various types of ecological patches is conducive to the improvement of the urban microclimate environment,thus promoting the formation of development between the local ecological environment and microclimate has a scientific guiding significance.