Delineation of urban growth boundary based on FLUS model under the perspective of land use evaluation in hilly mountainous areas

The urban heat island (UHI) environment is closely related to the daily life of residents, and the impact of UHI is further expanding in the era of rapid urbanization, which is particularly obvious in the Beijing-Tianjin-Hebei urban agglomeration and Guangdong-Hong Kong-Macao Greater Bay Area. To explore the connection between UHI and urban expansion, this study takes Guangdong, Hong Kong, and Macao Greater Bay Area as the study area, based on Google Earth Engine platform and Landsat satellite data. The mean standard deviation was used to analyze the heat island zoning in the Guangdong-Hong Kong-Macao Greater Bay Area from 2000 to 2020, and the direction and type of urban expansion in the Guangdong-Hong Kong-Macao Greater Bay Area were investigated by standard deviation ellipse and LEI, to explore the link between the type of urban expansion and the heat island region through geospatial analysis methods. The results of the study show that: (1) From 2000 to 2020, the proportion of the area of heat island regions generally showed an upward trend, with the largest increase in heat island regions from 2015 to 2020, and the spatial distribution of heat island regions is characterized by the Pearl River Delta as the center, radiating in all directions. (2) The speed of movement of urban centroids in the Guangdong-Hong Kong-Macao Greater Bay Area decreases in 2000-2015 and increases in 2015-2020. The direction of urban expansion in the first five years is dominated by the northeast, and the direction of urban expansion in the latter 15 years is generally dominated by the southwest, with the type of urban expansion dominated by the fringe type, and the enclave type of expansion accounting for a smaller proportion.

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Analysis of the spatial-temporal evolution and driving effect of land use change on carbon storage in urban agglomeration in the middle reaches of the Yangtze River

Li,

Shi,

Liu

et al. 2024

Preprint

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Land-use change affects the regional spatial patterns of carbon storage. Exploring the relationship of land use with carbon storage is crucial for optimizing land-use structure and sustainable development. We explored the spatial and temporal patterns of land use and carbon-storage changes in urban agglomerations in the middle reaches of the Yangtze River for 2035 using the PLUS-InVEST model. Natural, urban, and ecological development scenarios were considered. Land-use changes comprised increases in arable and construction lands and continuous losses in forest land from 2000 to 2020. Carbon storage decreased by 1 × 106 t, with forest conversion to cropland and construction land being the main decreasing drivers. The carbon storage of natural and urban developments decreased by 0.26 × 106t and 0.32 × 106t, while it increased by 0.16 × 106 under ecological development. NDVI (0.588) had the highest explanatory power for the spatial variation of carbon storage, followed by slope (0.454) and elevation (0.391). Natural environmental factors dominate the spatial variation of carbon storage. The combination of multiple factors affected the spatial and temporal variations of carbon storage. The interaction between soil erosion and elevation, NDVI, and annual rainfall was weakened, while the that of other factors was enhanced.

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Delineation of urban growth boundary based on FLUS model under the perspective of land use evaluation in hilly mountainous areas

Cited by 5 publications

References 36 publications

Assessing the impact of human activities on ecosystem asset dynamics in the Yellow River Basin from 2001 to 2020

Assessing the impact of human activities on ecosystem asset dynamics in the Yellow River Basin from 2001 to 2020

Urban sprawl and thermal response in the Guangdong-Hong Kong-Macao Greater Bay Area, 2000–2020

Analysis of the spatial-temporal evolution and driving effect of land use change on carbon storage in urban agglomeration in the middle reaches of the Yangtze River

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