Method for monitoring dynamic change of urban heat island intensity

Abstract

The invention provides a method for monitoring the dynamic change of the urban heat island intensity. According to the method, a processing and analysis technology of a thermal infrared remote sensingimage and a high-resolution remote sensing image is utilized, a qualitative or quantitative relation among the change of the heat island intensity of a target area, the land coverage change and the landscape indexes is obtained through multi-data image processing and change analysis, so that the understanding on the aspects such as the change of the heat island intensity pattern caused by land utilization transformation in the processes of urban construction, transformation and renovation can be conveniently studied, and a reference is provided for implementation of the policy.

Description

technical field [0001] The invention relates to the field of urban planning research, in particular to a method for monitoring dynamic changes in urban heat island intensity. Background technique [0002] One of the typical characteristics of urban climate is the urban heat island effect, which is the phenomenon that the temperature in the city is higher than that in the suburbs. On the one hand, the formation of urban heat islands is due to the heat emitted by densely populated buildings and population gathering in large modern cities; Smaller transpiration makes the city absorb and store more solar radiation energy during the day, and the temperature of the city cools down slowly at night and is higher than that of the suburbs. The urban heat island effect has many negative effects. In summer, due to the extensive use of air conditioners, the demand for electricity is greatly increased; for example, the hot weather leads to the shortage of municipal water supply; Therefo...

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Problems solved by technology

[0003] Thermal infrared remote sensing has been used to monitor the urban heat island effect for 30 years. Due to the land use and cover changes caused by urbanization and the associated factors such as population and economic development, it greatly affects the formation of urban climate. Many studies The paper also reported the use of satellite remote sensing to monitor the phenomenon of heat island expansion caused by urban construction. The impact of the renovation

[0004] In recent years, urban renewal has become a hot topic. Spatial information technology such as the application of remote sensing to support work in this field is still a relatively new research, and the use of thermal infrared and optical remote sensing images to dynamically monitor urban renewal is rarely applied.

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