Study On The Microclimate Interaction Between An Urban Inland River And The Surrounding Residential Areas In Severely Cold Regions

The good construction of urban microclimate is conducive to the livability of the city,especially in severely cold regions,it is particularly important to create a good microclimate environment in the city.In the city,the important factors that can affect its microclimate are architecture,hard pavement,greening,water body and so on.As a key part of urban planning and construction,water body can not only add vitality to the city construction,but also adjust the local environment of the city from the microclimate point of view,and create a green city and a harmonious city.Taking Harbin as an example,this paper studies the microclimate interaction between Majiagou River,the most universal River in Harbin,and its surrounding settlements.In order to study the interaction between the urban inland river and its surrounding settlements in the frigid area,firstly,the layout forms of the settlements around the inland river are summarized and summarized through the map survey,and the general and typical residential layout around the river — the mid-rise enclosed residential area and the high-rise determinant residential area are selected.In addition,the reference residential areas with the same architectural layout as the residential areas around the river are selected for reference.Next,this study measured the Majiagou River and its surrounding typical residential area and the reference residential area twice,which the measurements were carried out in two kinds of different water conditions in the ice state and non ice state respectively.Through the two measurements of air temperature,relative humidity,wind speed and other physical quantities,the quantitative analysis and get the difference of thermal environment between the residential area around Majiagou River and the reference residential area,as well as the inner river side interaction area.Then through the comparison of the trend between the data of five measuring points around the river simulated by ENVI-met software and the measured data,it is found that the trend of the simulated data of five measuring points is basically the same as the measured data.Through the correlation analysis and calculation,it is found that the simulation results of ENVI-met software have linear correlation with the measured results.Through ENVI-met software simulation of the width of the urban river proposed in this paper to optimize the construction strategy.The influence of the width of the inland river on the microclimate of different typical residential areas and interaction areas is simulated when the width of the inland river is 40 m,50m,60 m,80m and 150 m respectively,and the construction strategyof the seasonal and targeted width of the inland river is discussed.Finally,the paper summarizes the impact of urban inland river on the thermal environment of the surrounding residential areas and the difference of the thermal environment of the different interaction areas around the inland river,and proposes the width optimization scheme of the non navigable inland river for the cold cities through the method of ENVI-met software simulation.It is expected to provide reference for the planning and design of urban inland river and its surrounding settlements from the perspective of microclimate.