A Quantitative Evaluation Method of Urban Heat Island Effect

A technology for urban heat island effect and quantitative evaluation, applied in data processing applications, climate change adaptation, instruments, etc., can solve problems such as lack of quantitative models

Inactive Publication Date: 2021-12-17
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] Based on the research status at home and abroad, the research on the coupling relationship between urban heat island and land use type is mainly manifested in the qualitative analysis and simulation of the heat island effect by using different technical methods, but there is a lack of more quantitative models to better characterize the urban heat island effect. the numerical relationship between them, so new methods and models need to be introduced

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  • A Quantitative Evaluation Method of Urban Heat Island Effect
  • A Quantitative Evaluation Method of Urban Heat Island Effect
  • A Quantitative Evaluation Method of Urban Heat Island Effect

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0018] A kind of quantitative evaluation method method of urban heat island effect designed by the present invention, it comprises the steps:

[0019] Step 1: Obtain the original remote sensing image data of the city in the study area, and use the computer (ArcGIS and ENVI software) to perform atmospheric correction, projection transformation, image registration and cropping, and image preprocessing of geometric correction on the acquired original remote sensing image of the city in the study area , and based on the support vector machine classification method in supervised classification, the remote sensing images after image preprocessing are divided into five land use types: water body, construction land, forest land, cultivated land and unused land, and the urban land use classification map of the study area is obtained, and Combining land u...

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Abstract

The invention discloses a quantitative evaluation method of urban heat island effect, comprising the following steps: 1: data acquisition and preprocessing; 2: calculation of urban heat island intensity and grading; 3: calculation of land use contribution index LCI; 4: based on LCI Evaluation of urban heat island effect by coupling land use types with exponential model. The invention is used to more accurately quantify the relationship between different land use types in cities and the urban heat island effect, and the influence of changes in land use patterns on the heat island effect. The change of the urban underlying surface is the most critical factor affecting the urban heat island effect. The present invention quantitatively evaluates the relationship between the land use type in the urban underlying surface and the urban heat island effect, which can be used for the rational utilization of urban land resources. And configuration provides scientific guidance basis.

Description

technical field [0001] The invention relates to the field of earth science and technology, in particular to a quantitative evaluation method for urban heat island effect. Background technique [0002] Since the mid-20th century, urbanization has become one of the most important human activities. The influx of rural population into cities and the consequent conversion of urban green spaces to impervious surfaces often leads to an ecological imbalance between urban and rural areas. With the development of urbanization, the thermal properties of the underlying surface of the city have changed, which is reflected in the high temperature zone in the urban center and the low temperature zone in the suburbs near the urban area, that is, the urban heat island effect (Urban Heat Island). In the related research of urban heat island effect, the relationship between urban heat island and land use type has attracted extensive attention of many scholars and has become an important resea...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06K9/00G06Q10/06
CPCG06Q10/0639G06V20/13Y02A30/60
Inventor黄解军黄秋萍赵力学梁友嘉詹云军
OwnerWUHAN UNIV OF TECH