Spatiotemporal characteristics, patterns, and causes of land-use changes in China since the late 1980s  

作　　者：LIU Jiyuan KUANG Wenhui ZHANG Zengxiang XU Xinliang QIN Yuanwei NING Jia ZHOU Wancun ZHANG Shuwen LI Rendong YAN Changzhe WU Shixin SHI Xuezheng JIANG Nan YU Dongsheng PAN Xianzhang CHI Wenfeng 

机构地区：[1]Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China [2]Institute of Remote Sensing and Digital Earth, CAS, Beijing 100101, China [3]University of Chinese Academy of Sciences, Beijing 100049, China [4]Chengdu Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China [5]Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130012, China [6]Wuhan Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China [7]Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China [8]Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China [9]Institute of Soil Science, CAS, Nanjing 210008, China [10]Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China

出　　处：《Journal of Geographical Sciences》2014年第2期195-210,共16页地理学报（英文版）

基　　金：National Basic Research Program of China,No.2010CB950900;No.2014CB954302;National Key Technol-ogy R&D Program,No.2013BAC03B00;The Key Research Program of the Chinese Academy of Sciences,No.KSZD-EW-Z-021-02

摘　　要：Land-use/land-cover changes （LUCCs） have links to both human and nature inter- actions. China＇s Land-Use/cover Datasets （CLUDs） were updated regularly at 5-year inter- vals from the late 1980s to 2010, with standard procedures based on Landsat TM／ETM＋ im- ages. A land-use dynamic regionalization method was proposed to analyze major land-use conversions. The spatiotemporal characteristics, differences, and causes of land-use changes at a national scale were then examined. The main findings are summarized as fol- lows. Land-use changes （LUCs） across China indicated a significant variation in spatial and temporal characteristics in the last 20 years （1990-2010）. The area of cropland change de- creased in the south and increased in the north, but the total area remained almost un- changed. The reclaimed cropland was shifted from the northeast to the northwest. The built-up lands expanded rapidly, were mainly distributed in the east, and gradually spread out to central and western China. Woodland decreased first, and then increased, but desert area was the opposite. Grassland continued decreasing. Different spatial patterns of LUC in China were found between the late 20th century and the early 21st century. The original 13 LUC zones were replaced by 15 units with changes of boundaries in some zones. The main spatial characteristics of these changes included （1） an accelerated expansion of built-up land in the Huang-Huai-Hai region, the southeastern coastal areas, the midstream area of the Yangtze River, and the Sichuan Basin; （2） shifted land reclamation in the north from northeast China and eastern Inner Mongolia to the oasis agricultural areas in northwest China; （3） continuous transformation from rain-fed farmlands in northeast China to paddy fields; and （4） effective- ness of the ＂Grain for Green＂ project in the southern agricultural-pastoral ecotones of Inner Mongolia, the Loess Plateau, and southwestern mountainous areas. In the last two decades, although climate changeLand-use/land-cover changes （LUCCs） have links to both human and nature inter- actions. China＇s Land-Use/cover Datasets （CLUDs） were updated regularly at 5-year inter- vals from the late 1980s to 2010, with standard procedures based on Landsat TM／ETM＋ im- ages. A land-use dynamic regionalization method was proposed to analyze major land-use conversions. The spatiotemporal characteristics, differences, and causes of land-use changes at a national scale were then examined. The main findings are summarized as fol- lows. Land-use changes （LUCs） across China indicated a significant variation in spatial and temporal characteristics in the last 20 years （1990-2010）. The area of cropland change de- creased in the south and increased in the north, but the total area remained almost un- changed. The reclaimed cropland was shifted from the northeast to the northwest. The built-up lands expanded rapidly, were mainly distributed in the east, and gradually spread out to central and western China. Woodland decreased first, and then increased, but desert area was the opposite. Grassland continued decreasing. Different spatial patterns of LUC in China were found between the late 20th century and the early 21st century. The original 13 LUC zones were replaced by 15 units with changes of boundaries in some zones. The main spatial characteristics of these changes included （1） an accelerated expansion of built-up land in the Huang-Huai-Hai region, the southeastern coastal areas, the midstream area of the Yangtze River, and the Sichuan Basin; （2） shifted land reclamation in the north from northeast China and eastern Inner Mongolia to the oasis agricultural areas in northwest China; （3） continuous transformation from rain-fed farmlands in northeast China to paddy fields; and （4） effective- ness of the ＂Grain for Green＂ project in the southern agricultural-pastoral ecotones of Inner Mongolia, the Loess Plateau, and southwestern mountainous areas. In the last two decades, although climate change

关 键 词：satellite remote sensing land-use change CHARACTERISTICS spatial pattern China 

分 类 号：P315.5[天文地球—地震学] X171.1[天文地球—固体地球物理学]