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Applying a support vector model to assess land cover changes in the Uvs Lake Basin ecoregion in Mongolia

Information Processing in Agriculture 2019年第1期6卷 158-169页

作者： Buyan-Erdene Jamsran Chinsu Lin Ishgaldan Byambakhuu Jamsran Raash Khaulenbek Akhmadi Department of Forestry and Natural Resources National Chiayi University300 University Rd.ChiayiChiayi 60004TaiwanChina Department of Environment and Forest Engineering School of Engineering and Applied SciencesNational University of MongoliaMongolia Uvs Lake Basin Projected Area Administration Office Uvs ProvinceMongolia Head of Division for Desertification Study Institute of Geography and GeoecologyMongolian Academy of SciencesMongolia

The Uvs Lake Basin in western Mongolia is a natural world heritage site and is known for its diversity in landscape and ***,investigative research has shown that the protected pristine ecotone is suffering land degradation due to global *** order to obtain evidence of the changes over a long-term time scale,serial multi-temporal landsat images obtained between 1995 and 2015 were used to classify land cover and land cover changes over the Basin ecoregion using a machine learning classification technique,support vector *** showed that the forest land area in 1995 was 1888.48 km^2 which was equivalent to 7.48%of the total area of the study *** forest area showed considerable decrease by 301.36 km^2 during the first decade(1995–2004)and 155.81 km^2 during second decade(2004–2015).A total of 457.17 km^2 or 24.21%of the forest land has been developed,most being changed into *** major driver of such changes was illegal logging,forest fire,and pest *** grassland was changed primarily into bare land during the two *** area of glacier was decreased and primarily changed into water *** contrast,the area of sand in the Basin ecoregion increased dramatically from 65.20 km^2 in 1995 to 318.33 km^2 in 2015 the increase being mostly from the transition of bare *** summary,the drivers of the significant decrease of greenness coverage and increase of sand/bare land areas were the interaction of complicated disturbances in both anthropogenic and natural factors,in which logging,grazing,wind erosion,and global warming were the key causes.

关键词： land suppression Soil degradation Forest reduction Change analysis landscape ecology

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