China's changing landscape during the 1990s: Large-scale land transformations estimated with satellite data
China's changing landscape during the 1990s: Large-scale land transformations estimated with satellite data
复制标题
20 世纪 90 年代中国面貌的变化：利用卫星数据估算大规模土地变化
DOI：
10.1029/2004gl021649
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发表时间：
2005-01-27
影响因子：
5.2
通讯作者：
Zhang, ZX
中科院分区：
文献类型：
--
作者：
Liu, JY;Tian, HQ;Zhang, ZX
中国不断增长的人口对粮食的需求，以及中国从一个以农村为主的社会向一个预计在20年内将有一半以上人口居住在城市的社会转型，推动了中国土地覆盖的变化。本文对1990年至2000年间收集的遥感数据进行了分析，绘制了变化的幅度和模式，例如草地和森林向农田的转变以及农田因城市扩张而流失。利用来自Landsat TM的高分辨率（30米）图像，我们发现1990 - 2000年间，全国耕地面积增加了299万公顷，城市面积增加了82万公顷。在中国北方，大面积的林地、草原和湿地被改造成农田，而在中国南方，大面积的农田被改造成城区。这里展示的土地覆盖产品，第一次让中国政府和国际社会对国家景观的改变程度有了明确的了解。以一种可靠的、空间上清晰的方式记录这些变化，是未来几十年中国环境管理的基础。
Land-cover changes in China are being powered by demand for food for its growing population and by the nation's transition from a largely rural society to one in which more than half of its people are expected to live in cities within two decades. Here we use an analysis of remotely sensed data gathered between 1990 and 2000, to map the magnitude and pattern of changes such as the conversion of grasslands and forests to croplands and the loss of croplands to urban expansion. With high-resolution ( 30 m) imagery from Landsat TM for the entire country, we show that between 1990 and 2000 the cropland area increased by 2.99 million hectares and urban areas increased by 0.82 million hectares. In northern China, large areas of woodlands, grasslands and wetlands were converted to croplands, while in southern China large areas of croplands were converted to urban areas. The land-cover products presented here give the Chinese government and international community, for the first time, an unambiguous understanding of the degree to which the nation's landscape is being altered. Documentation of these changes in a reliable and spatially explicit way forms the foundation for management of China's environment over the coming decades.