Study on urban thermal environmental factors in a water network area based on CFD simulation

Abstract

Abstract Cities on the Jianghan plain with a dense water network have a hot and humid climate and a long period of calm wind in the summer. Urban design guidance of a water network with a thermal environment as the starting point is a design control path that takes into account geographical features, climatic conditions and urban construction under complex constraints. Based on the current block division and development intensity, this study of the thermal environment of Xiantao adopts the methods of multiple linear regression and wind–thermal environment simulation. The results show that regional agglomeration shows the spatial distribution of the urban thermal environment in the water network area. The distribution of hot sensitive areas is closely related to the pattern of clusters. The business district, high-density urban area, basic energy facility area and transportation hub are the thermal environment areas. The experimental results show that residential and industrial land, proportion of water area, average elevation and urban development intensity are the main factors influencing the thermal environment of the water network, and the strengths of their effects are in the order of development intensity > water area proportion > industrial land proportion > residential land proportion > average elevation. The urban thermal environment of the dynamic construction area can be inferred. The improvement of urban wind and thermal environment quality is implemented in the urban space level by guiding the construction intensity, ventilation, greening and water, and paving and shading of the thermal environment control area. The exploration of the thermal environment improvement method in the urban design of a water network region provides the guidance for similar cities seeking to cope with climate change.