Correlation Analysis Between River Wind Penetration Ability And Urban Morphological Index Of Waterfront Block

With the rapid development of China’s economy and the accelerating urbanization process,the urbanization of the economically developed middle and lower reaches of the Yangtze River has gradually increased,and the urban heat island phenomenon has become more serious.Energy consumption has increased dramatically.Urban issues,including microclimates issues,have received more attention.Previous studies have shown that river wind has a significant regulatory effect on urban climate,but the disorderly development of the waterfront district has greatly reduced the regulation of the river wind.Therefore,it is urgent to develop the river wind infiltration capacity and the spatial form of the waterfront district.In order to properly control the spatial shape of the street in the planning and design stage of the waterfront district,and conduct research on the ventilation of the waterfront street,it is an important entry point to select a group of urban spatial form quantitative indicators that can describe the spatial pattern of the waterfront district more comprehensively and accurately,and has a strong correlation with the internal permeability of Jiangshui to the waterfront district.In the current domestic and international research,there are two main problems in the design strategy of microclimate regulation and air quality improvement in waterfront district:(a)The design strategy is mainly qualitative,supplemented by quantitative,the operability is not strong in actual planning and design.;(b)The strategy is mainly proposed in the later stage of the design stage for the architectural and landscape design of the waterfront district.However,the overall shape of the district space has been basically fixed,and the penetration of the river wind cannot be fully guaranteed.Therefore,the purpose of this paper is to use the statistical correlation analysis and CFD numerical simulation to explore and find potential spatial morphological quantification that is sensitive to the river wind penetration ability and accurately describe the spatial form of the waterfront district.The evaluation index provides a control strategy for the planning of the waterfront district and a certain quantitative space control basis to provide guidance for the urban design and regulation of the waterfront district.This paper firstly extracts a series of spatial morphological indicators that can be quantitatively analyzed by consulting a large number of relevant literatures at home and abroad.Since the moisture content of river wind is obviously higher than the moisture content of the air inside the district,the air moisture content is selected to characterize the ability of the river wind to penetrate into the district.After referring to the actual engineering experience and specifications,the average wind speed and air moisture content inside the waterfront district under different morphological indicators were obtained by CFD simulation,and the water vapor decay rate of the district was proposed,namely Vapor Decay Rate(VDR).The vapor decay rate is used as an evaluation index to analyze the ability of the river wind to penetrate into the district.Finally,the correlation analysis was carried out by statistical methods,and the spatial morphological indicators with the strongest correlation with river wind infiltration ability were selected.By summarizing the theoretical research in the previous article and combining the actual construction projects,this paper continues to study the actual construction cases of the waterfront district.By controlling the spatial shape indicators of the district and the corresponding CFD simulation analysis,the paper proposes a certain improvement strategy for the micro-environment of the waterfront district,verifies The validity and guiding significance of the theory at the same time.