The eco-environment of the 13 provinces in the northern China is relatively fragile.In order to understand the eco-environment feedback mechanism and seek a way to optimize land use/cover spatial pattern under ecological security,land use/cover dynamic changes in the northern China from 1989 to 1999 was investigated by RS and GIS.The results show that:(1) Grassland,unused land and forestland were the main land use/cover types in the research areas.In the study period,land use/cover change greatly.Although the eco-environment policies of government resulted in some original farmland being returned to grassland and forestland,the excessive reclamation in the region turned more grassland and forestland into farmland simultaneously.(2) Human activities comprehensively affected land use/cover dynamic change in the study area.The heterogeneity of the whole landscape increased.The land use/cover spatial structure tended to be more diversified and even.(3) The center of gravity of all land use/cover types changed.The water body is the most distinct and unused land,farmland and urban land follow.(4) Land use/cover changes show regional district differences.
LI Yue-Chen, LIU Chun-Xia
. Land Use/Cover Dynamic Changes in the Northern China[J]. SCIENTIA GEOGRAPHICA SINICA, 2007
, 27(1)
: 45
-52
.
DOI: 10.13249/j.cnki.sgs.2007.01.45
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