Abstract
The changes of land use/land cover (LULC) are important factor affecting the intensity of the urban heat island (UHI) effect. Based on Landsat image data of Wuhan, this paper uses cellular automata (CA) and artificial neural network (ANN) to predict future changes in LULC and LST. The results show that the built-up area of Wuhan has expanded, reaching 511.51 and 545.28 km2, while the area of vegetation, water bodies and bare land will decrease to varying degrees in 2030 and 2040. If the built-up area continues to expand rapidly, the proportion of 30~35 °C will rise to 52.925% and 55.219%, and the affected area with the temperature >35 °C will expand to 15.264 and 33.612 km2, respectively. The direction of the expansion range of the LST temperature range is obviously similar to the expansion of the built-up area. In order to control and alleviate UHI, the rapid expansion of impervious layers (built-up areas) should be avoided to the greatest extent, and the city’s “green development” strategy should be implemented.
Highlights
China is going through a stage of rapid urbanization, the proportion of the urban economy in the national economy is constantly increasing [1], and the resource and environmental problems facing cities are becoming increasingly urgent [2,3]
The urban heat island (UHI) effect is a product of urbanization [10,11], and is the most prominent feature of the impact of human activities on temperature [12,13]
UHI is one of the most significant features of urban climate, and it is one of the environmental problems that are ubiquitous in urban ecosystems and attract more and more attention [14,15]
Summary
China is going through a stage of rapid urbanization, the proportion of the urban economy in the national economy is constantly increasing [1], and the resource and environmental problems facing cities are becoming increasingly urgent [2,3]. The rapid development of urbanization and the rapid expansion of urban population have caused impervious surfaces represented by reinforced concrete to gradually occupy urban space [6]. These building materials have small heat capacity, fast heat absorption, and strong temperature storage, and are the main heat source for the rise of ground temperature [7,8,9]. The research on the relationship between LULC and urban surface temperature can analyze the spatial characteristics of urban thermal environment under LULC from the origin of heat island phenomenon, and provide theoretical basis for rational use of land resources, rational planning of urban construction, and weakening of urban heat island effect [18,19]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
