郭碧云,张广军.基于遥感和GIS的土地利用/覆被变化研究——以内蒙古多伦县为例[J].干旱地区农业研究,2009,27(4):240~244
基于遥感和GIS的土地利用/覆被变化研究——以内蒙古多伦县为例
Study on land use and land cover change based on remote sensing and GIS——A case study of Duolun County in Inner Mongolia
  
DOI：10.7606/j.issn.1000-7601.2009.04.46
中文关键词:  遥感  GIS  土地利用/覆被变化  多伦县
英文关键词:remote sensing  GIS  land use/cover change  Duolun County
基金项目:美国NSF项目(0507948和0624018)
作者单位
郭碧云 西北农林科技大学资源环境学院， 陕西 杨凌 712100； 密西根州立大学林业科学系，美国密西根州 东兰辛 48823 
张广军 西北农林科技大学资源环境学院， 陕西 杨凌 712100 
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中文摘要:
      以内蒙古多伦县1975年、1990年、2000年和2004年4期遥感影像为基础数据，再辅以DEM数据、NDVI数据、土地利用图和地面调查数据进行监督分类；基于此，在GIS空间数据平台的支持下，采用空间分析和统计方法，对多伦县近30年来土地利用/覆被变化情况进行分析研究。结果表明，多伦县土地覆盖以草地、农业用地和未利用土地3种类型为主。各个时期的地类变化中，以2000～2004年的林地变化最大，动态度为39.17%；以1975～1990年间的农业用地变化最小，动态度为0.32%。以20世纪70年代为起点，90年代主要表现为农业用地、草地面积增加，而未利用土地、林地面积减少；到2000年左右，林地、未利用地、农业用地3种用地面积增加，而草地面积则大幅减少；至2004年，农业用地和未利用土地面积减少，林地、草地面积则显著增加，表明近年来多伦县土地覆被状况有所改善，区域生态正朝着有利于环境保护的方向发展。
英文摘要:
      Assisted by the dataset of Digital Elevation Model, Normalized Difference Vegetation Index and land use maps, four periods of Landsat MSS, TM and ETM+ data fro m 1970s to near present were adopted for the classification of the historical land use change in Duolun County of Inner Mongolia in China. Based on the platform of the Geographic Information System, changeable patterns of the regional land use were spatially and statistically analyzed for the above four durations. The results revealed that there have been obvious changes in the land use patterns in the past 3 decades. The area has been dominated by grassland, farmland and unused land, and changes in land uses during the 4 periods showed differences. Maximum change in forestland occurred in the period of 2000～2004 with the changeable ratio of 39.17%; Minimum change in farmland occurred from 1975 to 1990 with a relative small changeable ratio of 0.32%. Based on the land use statistics in 1970s, the significant land use change was mainly focusing on the increase of farmland and grassland and the decrease of forestland and unused land in 1990s. To the year of 2000, the increase of forestland, unused land and farmland, and the remarkable decrease of grassland featured mainly. In the year of 2004, the decrease of the area of farmland and unused land while the increase of grassland and forestland was obvious, which showed a real regional improvement on environmental conditions across Duolun County according to the land use change in recent years.
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