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Urban heat island strength calculation method based on composite indexes

A technology of urban heat island and composite indicators, applied in calculation, instrumentation, climate change adaptation, etc., can solve the problems that cannot fully represent the intensity of regional heat island, reflect and describe the characteristics of urban thermal environment changes, etc.

Pending Publication Date: 2020-02-04
FUZHOU UNIV
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Problems solved by technology

However, the urban environment is a multi-factor coupling body that is in continuous dynamic change. The pure "point" data change cannot fully represent the regional heat island intensity, let alone reflect and describe the changing characteristics of the urban thermal environment from the "surface".

Method used

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  • Urban heat island strength calculation method based on composite indexes
  • Urban heat island strength calculation method based on composite indexes
  • Urban heat island strength calculation method based on composite indexes

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] Please refer to Figure 5 , the present invention provides a method for calculating urban heat island intensity based on a composite index, comprising the following steps:

[0046] Step S1: Determine the center of gravity of the urban form in the study area, and use the four-way thermal field profile method to calculate the regional temperature difference RTR;

[0047] Step S11: Determine the center of gravity of the urban form in the study area; the coordinates (x, y) of the center of gravity of the urban form are determined on the basis of the outline of the urban form of each typical city by the following formula:

[0048]

[0049] In the formula: w i is the weight of the i-th discrete target, which is determined according to the ratio of the area of ​​each discrete target to the total area; x i 、y i It is the horizontal and vertical co...

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Abstract

The invention relates to an urban heat island strength calculation method based on composite indexes, and the method comprises the following steps: S1, determining the urban form gravity center of a research region, and calculating the regional temperature difference RTR through employing a four-way thermal field profile method; S2, obtaining a surface temperature image of the research area, carrying out normalization processing, and calculating an urban heat island proportion index URI of the research area; and S3, calculating the urban heat island composite index strength CII of the researcharea according to the regional temperature difference RTR and the urban heat island proportional index URI, and quantifying the regional urban heat island strength. According to the method, the areatemperature difference extreme value brought by the urban heat island can be reflected, the proportion change of areas with different temperature levels in the urban form can be represented, and the development degree of the urban heat island in the area can be objectively described.

Description

technical field [0001] The invention relates to the field of urban heat island research, in particular to a calculation method for urban heat island intensity based on a composite index. Background technique [0002] The "Urban Heat Island" (UHI) effect is one of the typical manifestations of urban climate, which refers to the phenomenon that the local temperature in the urban center is significantly higher than that in the suburbs. With the further improvement of people's requirements for living environment, living comfort and health, a good urban thermal environment has become the basic condition to support the sustainable development of cities. At present, the global urbanization process is developing at a high speed, and the problem of urban thermal environment has become more and more prominent and acute. Urbanization has changed the natural landscape pattern dominated by vegetation into an urban landscape pattern represented by artificial buildings, and the substantia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0639G06Q50/26Y02A30/60
Inventor 王琳徐涵秋林中立李叶繁
Owner FUZHOU UNIV
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