摘要
基于历史文献资料、树木年轮、湖泊沉积的研究结论,以绿洲格局演变和土地荒漠化过程为主线,分析了黑河流域历史时期土地利用/覆被变化及其驱动机制。结果表明:历史资料记录的人口和土地垦殖数据的可信度不高,今后在充分考虑历史数据误差因素的基础上进一步提高耕地重建的估算精度;黑河流域历经西汉、唐、明清、建国后4次大规模的移民拓荒高潮,历史时期土地利用变化的总体特征是人工灌溉农业逐步取代原始植被;明清之前,自然因素对土地利用变化的影响起着主导性的作用;而现代土地利用主要受人为因素控制。
Based on historical archives, lake sediment record and tree-ring data, the spatiotemporal distribu- tion of the oasis of Heihe River and its historical desertification processes were examined in this paper. Then, the mechanism for the land use/cover change in historical period of this area was discussed. The results showed that： （1） the attention should be paid when using historical records to discuss the human impacts because the land and population records in historical archives are always inaccurate; （2） four processes of migration occurred in West-Han dynasty, Tang dynasty, Ming and Qing dynasties, and from 1949 to present, respectively, have greatly changed the land cover patterns, as a whole, the natural vegetation of this region was gradually replaced by irrigated agriculture; （3） the land use/cover change was dominated by natural processes before the Ming and Qing dynasties, nevertheless, current land use has been totally impacted by human beings.
出处
《水土保持研究》
CSCD
北大核心
2015年第3期336-340,348,共6页
Research of Soil and Water Conservation
基金
中国科学院重点部署项目“近500年河西走廊及邻近沙漠生态环境演变的过程与机制”(KZZD-EW-04-05)
关键词
土地利用
历史时期
驱动机制
黑河流域
land use change
historical periods
driving mechanism
Heihe River Basin
