2010-2015年中国土地利用变化的时空格局与新特征

doi:10.11821/dlxb201805001

Abstract

Abstract:

Land use/cover change is an important theme on the impacts of human activities on the earth systems and global environment change. National land-use changes of China during 2010-2015 were acquired by the digital interpretation method using high-resolution remotely sensed images, i.e. the Landsat8 OLI, and GF-2 remote sensing images. The spatio-temporal characteristics of land-use changes across China during 2010-2015 were revealed by the indexes of dynamic degree model, annual land-use changes ratio, etc. The results indicated that built-up land increased by 24.6×10³ km², while cropland decreased by 4.9×10³ km², and the total area of woodland and grassland decreased by 16.4×10³ km². The spatial pattern of land-use changes in China during 2010-2015 was concordant with that of the period 2000-2010. Specially, new characteristics of land-use changes emerged in different regions of China in 2010-2015. The built-up land in eastern China expanded continually, and the total area of cropland decreased, both at decreasing rates. The rates of built-up land expansion and cropland shrinkage were accelerated in central China. The rates of built-up land expansion and cropland growth increased in western China, while the decreasing rate of woodland and grassland accelerated. In northeastern China, built-up land expansion slowed down continually, and cropland area increased slightly accompanied by the conversions between paddy land and dry land. Besides, woodland and grassland area decreased in northeastern China. The characteristics of land-use changes in eastern China were essentially consistent with the spatial governance and control requirements of the optimal development zones and key development zones according to the Major Function-oriented Zones Planning implemented during the 12th Five-Year Plan (2011-2015). It was a serious challenge for the central government of China to effectively protect the reasonable layout of land use types dominated with the key ecological function zones and agricultural production zones in central and western China. Furthermore, the local governments should take effective measures to strengthen the management of territorial development in future.

Key words: land use change, spatio-temporal characteristics, remote sensing, Major Function-oriented Zones, China

LIU Jiyuan,NING Jia,KUANG Wenhui,XU Xinliang,ZHANG Shuwen,YAN Changzhen,LI Rendong,WU Shixin,HU Yunfeng,DU Guoming,CHI Wenfeng,PAN Tao,NING Jing. Spatio-temporal patterns and characteristics of land-use change in China during 2010-2015[J].Acta Geographica Sinica, 2018, 73(5): 789-802.

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Spatio-temporal patterns and characteristics of land-use change in China during 2010-2015

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