中国华北地区土地利用动态变化特点分析

以遥感与GIS为技术支撑，对华北地区1995－2000年土地利用动态变化进行了调查，并对变化特点进行了分析。结果表明，华北地区城乡、农村居民点及工交建设用地增加显，以农村居民点的变化尤为突出；耕地减少，且主要变为建设用地；林地减少；未利用土地面积减少明显；土地利用类型多样性在降低，说明人类活动进一步加剧，对生态环境造成不良影响。

AN ANALYSIS OF CHARACTERISTICS OF LAND USE DYNAMIC CHANGE IN NORTH CHINA

There has been remarkable change in land use types of North China in recent years. The authors completed the dynamic investigation of land use, and analyzed land use dynamic change from 1995 to 2000 based on RS and GIS. The results reveal that the land used for urban and rural residence has been increasing rapidly, especially in the countryside, and the cultivated land has been reduced and increasingly changed into construction land. It is also shown that the forest land, the virgin soil land and the diversity of land use have been decreasing obviously, indicating that the human activities have become stronger and stronger, which exert adverse impacts on the environment.