Spatial-temporal characteristics of construction land expansion and occupation of cultivated land in urban agglomeration of central and southern Liaoning Province based on Remote Sensing
REN Xiaoyan1,2(), HE Yanfen1(), WANG Zongming2
1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China 2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
This study observed relatively developed urbanized and industrialized urban agglomeration in central and southern Liaoning. The authors used remote sensing data as the information source to study the expansion of construction land and the characteristics of its occupation of cultivated land. The results show that, from 1990 to 2015, the total land use for construction of urban agglomeration in central and southern Liaoning increased by 1 942.07 km 2, with an increasing rate of 30.52%, in which 64.68% of new construction land was derived from the occupation of cultivated land. The difference in the expansion of construction land among cities was obvious. The comparison of data in different periods shows that the expansion rate of construction land in central and southern Liaoning had a turning point. During the study period, the area of cultivated land in central and southern Liaoning continued to decrease, and 79.76% of its loss was converted into construction land. Due to the advancement of agricultural science and technology, the current reduction in cultivated land area has a small impact on grain production in central and southern Liaoning. However, some cities have caused food production reduction due to occupation of cultivated land, which requires further attention.
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REN Xiaoyan, HE Yanfen, WANG Zongming. Spatial-temporal characteristics of construction land expansion and occupation of cultivated land in urban agglomeration of central and southern Liaoning Province based on Remote Sensing. Remote Sensing for Land & Resources, 2020, 32(3): 98-105.
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2020, Vol. 32 
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