Spatial-temporal dynamics of cultivated land from 1990 to 2014 in Hunan Province, China

Authors: De YU*, Department of Land Resources Management, China University of Geosciences, Shougeng Hu, Department of Land Resources Management, China University of Geosciences
Topics: Land Use and Land Cover Change, Applied Geography, Resources
Keywords: land use/land cover; cultivated land; sustainable; spatial and temporal pattern; Hunan Province
Session Type: Paper
Day: 4/3/2019
Start / End Time: 2:35 PM / 4:15 PM
Room: Marshall North, Marriott, Mezzanine Level
Presentation File: No File Uploaded

As an important resource for ensuring food security and regional sustainable development, we must implement the strictest cultivated land protection policies. In this paper, we used the Landsat imagery to obtain land use land cover data of 1990, 2000 and 2014 in Hunan Province, and then we analyzed the process of cultivated land change from 1990 to 2014. By analyzing the relationship between the change of cultivated land and DEM, slope, traffic condition, socio-economic data, et al, we concluded the characteristic of cultivated land change in Hunan Province during 1990-2014, and the problems of cultivated land protection. The results showed that (a) the total area of cultivated land continued to decline during 1990-2014, from 6246619.2 hm2 to 5970138.48 hm2, the paddy field first increased and then decreased, and the upland first decreased and then increased; (b) the per capita area of cultivated land also continued to decline, from 0.10 to 0.08 hm2 per capita; (c) the cultivated land’s change has a large spatial difference, and the cultivated land in each region shows a decreasing trend, in order of the greatest change intensity, it goes: southern Hunan, eastern Hunan, northern Hunan, central Hunan, western Hunan Province; (d) there are a large number of cultivated land in Hunan Province that is not conducive to sustainable production due to large slope and poor transportation condition, and the reserve resources of cultivated land are scarce, thus, the trinity protection of cultivated land’s quantity, quality and ecology in Hunan Province faces enormous challenges.

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