Urban ventilation corridor assignment method based on heat island effect elimination

Abstract

The invention provides an urban ventilation corridor assignment method based on heat island effect elimination, comprising the steps of: 1) obtaining urban meteorological data, inputting data into an urban 3D building space model to construct an urban environment meteorological chart, identifying an effect space, and determining the effect space through field measurement; 2) analyzing the predominant wind direction of urban prevailing wind, researching urban peripheral conditions to determine an urban internal wind source, and determining a compensation space; and 3) according to the effect space and the compensation space, under the premise that the width of a main ventilation corridor of an urban ventilation corridor is no less than 200 m, the width of a secondary corridor is no less than 100m, and the angle between the urban ventilation corridor and the predominant wind direction is less than 45 EDG, and based on an urban inner opening space, building density and the average height of buildings on two sides, constructing the urban ventilation corridor. The method improves the current technology on effect space positioning, compensation space selection and ventilation corridor assignment, thereby making urban ventilation corridor assignment more accurate, systematic and efficient.

Description

technical field [0001] The invention belongs to the field of urban planning methods, in particular to a method for delineating urban ventilation corridors based on the resolution of the heat island effect. Background technique [0002] The delineation of urban ventilation corridors has a direct effect on dealing with the current climate problems such as high temperature heat waves, air pollution, frequent occurrence of smog, and intensified urban heat island effect. Urban ventilation corridors can promote urban air circulation and reduce air pollution, thereby improving the urban ventilation environment, especially alleviating the heat island effect in summer, reducing the frequency of smog during the heating period in winter, and enabling citizens to have a comfortable and healthy urban living environment. [0003] There are three main traditional urban planning techniques for delineating urban ventilation corridors, which are based on the theoretical mechanism of air flow,...

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Problems solved by technology

[0005] Main problem: In actual observation, it is found that the pressure gradient force and ground friction force cannot be directly measured for the time being, and can only provide theoretical guidance for the delineation of urban ventilation corridors, and it is difficult to form a unified standard to standardize the delineation method

[0007] Main problem: The positioning and searching of the action space and compensation space are often the result of the intellectual activities of the human brain, and there is no systematic and scientific delineation of the air guiding channel.

[0009] The main problem: the OAA-AVHRR dual-channel split window algorithm is too cumbersome to invert the surface temperature of Landsat 8 images. Because the data is difficult to obtain and the processing time is long, and the error is large, it is not conducive to actual operation. For urban ventilation corridors In terms of road regulations, the practical value is low

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