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[1]Xie Xianjian.Spatiotemporal Characteristics of Urban Construction Land Expansion and Occupation of Arable Land in Sichuan Province[J].Research of Soil and Water Conservation,2024,31(03):342-349.[doi:10.13869/j.cnki.rswc.2024.03.020]

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Spatiotemporal Characteristics of Urban Construction Land Expansion and Occupation of Arable Land in Sichuan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 03 Page number: 342-349 Column: Public date: 2024-04-30

Title:: Spatiotemporal Characteristics of Urban Construction Land Expansion and Occupation of Arable Land in Sichuan Province

Author(s):: Xie Xianjian; (School of Geography and Resource Science, Neijiang Normal University, Neijiang, Sichuan 641000, China)

Keywords:: Sichuan Province; expansion of construction land; arable land occupation; RS; GIS; food security

CLC:: TP79

DOI:: 10.13869/j.cnki.rswc.2024.03.020

Abstract:: [Objective] The aims of this study are to investigate the spatiotemporal characteristics of urban construction land expansion and its occupation of arable land in Sichuan Province, and to provides a theoretical basis for protecting the sustainable use of arable land resources in Sichuan Province and ensuring regional food security. [Methods] Sichuan Province was taken as the research object. The spatiotemporal variation characteristics of urban construction land expansion on arable land occupation process from 2000 to 2020 were analyzed based on remote sensing data and GIS technology. [Results] Over the past 20 years, urban construction land in Sichuan Province had continued to expand, increasing by 3 260.56 km², with a growth rate of 110.34%. Among them, 2 900.34 km² of newly added construction land had been transferred to arable land, which was the main source of urban construction land expansion in Sichuan Province. The continuous expansion of construction land continued to occupy the arable land resources around the city, which might threaten the regional food production security. The expansion of construction land in Sichuan Province was characterized by centralized distribution in space. The spatial difference of construction land expansion among cities and prefectures was significant. The distribution of expanded construction land was a high-value area which centered in Chengdu, and then gradually spreaded to the eastern cities in a plane shape, while distribution of the expanded construction land in the western cities was characterized as sparse spots. The expansion of construction land in Sichuan Province was highly dependent on occupying arable land. In recent years, although measures had been actively implemented to optimize the grain production structure, to continue to implement land consolidation, agricultural structure adjustment, and to continuously increase support for grain production in Sichuan Province. [Conclusion] Overall, the decrease in arable land area in Sichuan Province has little impact on the formation of grain production, but if the trend of expanding construction land and occupying more arable land is not effectively curbed, a potential threat will be still posed to future food production security.

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Last Update: 2024-04-30