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Understanding cultivated land dynamics and its driving forces in northern China during 1983-2001

Journal of Geographical Sciences 2005年第4期15卷 387-395页

作者： HE Chunyang LI Jinggang WANG Yuanyuan SHI Peijun CHEN Jin PAN Yaozhong Key Laboratory of Environmental change and Natural Disaster Ministry of Education of China Beijing Normal University College of Resources Science ＆ Technology Beijing NormalUniversity Beijing 100875 China Institute of Remote Sensing Applications CAS Beijing 100101 China

Based on the long-term serial NOAA/NDVI dataset during 1983-1999 and SPOT/VGT dataset in 2001, the land use/cover change information in the 13 provinces of northern China was extracted based on the analysis of the cultivated landscape characteristics at first, then the effects of human activities on cultivated land process were explored by GIS and the driving forces of cultivated land change were investigated. The conclusions can be drawn as follows：（1） The constant increase of weak ecological function land as desert and cultivated land and the decrease of the ecological function land of forest and shrub were the main characteristics of the land use/cover change in the 13 provinces from 1983 to 1999, which showed the effects on the ecological adjustment fimction. However, such situations were changed to some extent in the 2000s because of the eco-construction policy of the government. （2） From 1983 to 2001, the Barycenter of cultivated land tended to move from northeast to southwest with the topography and transportation situations being the main influences on the cultivated land distribution. It is found that the cultivated land use intensity decreased noticably with the increase of distance from the main communication arteries. （3） The improvement of the people＇s living standard is closely related with the cultivated land change. The structural adjustment in the agricultural land caused by economic development and the improvement of the people＇s living standard ig an important factor affecting the cultivated land change in northern China from 1983 to 2001

关键词： cultivated land change spatial process driving forces northern China

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