| Study on land use and land cover change based on remote sensing and GIS——A case study of Duolun County in Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2009.04.46 |
| Key Words: remote sensing GIS land use/cover change Duolun County |
| Author Name | Affiliation | | GUO Biyun | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Department of Forestry, Michigan State University, East Lansing, Michigan 48823, USA | | ZHANG Guangjun | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| 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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