Dynamic monitoring of land use/cover change and urban espansion in Ulaanbaatar using Landsat images from 1990 to 2010

Authors: Kai Cheng*, Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences, Juanle Wang, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Xuehua Han, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science. , Jaahanaa Davaadorj, Department of Geography School of Art & Sciences, The National University of Mongolia. , Ochir Altansukh, Department of Environment and Forest Engineering,The National University of Mongolia
Topics: Land Use and Land Cover Change, Geographic Information Science and Systems, Remote Sensing
Keywords: Land use/cover, urban expansion, driving forces, grey correlation degree
Session Type: Paper
Day: 4/11/2018
Start / End Time: 3:20 PM / 5:00 PM
Room: Lafayette, Marriott, River Tower Elevators, 41st Floor
Presentation File: No File Uploaded

Ulaanbaatar experienced a rapid development in recent years and its land use/land cover changed a lot. In this paper, we obtained the land use/cover information using Landsat images from 1990, 2010 and 2015 by object-oriented classification with eCognition software. To guarantee the classification accuracy we inferred past land use and land cover from 2013 to 2016 field work photographs, Google Earth images. We classified six classes, namely grassland, forest, cropland, built area, water and barren. Then changes in land use/land cover (LULC) and urban expansion were analyzed based on the classification results. Ulaanbaatar showed an unstable composition of land cover during the study period and the biggest amplitude of changes were observable in the built area. From 1990 to 2015, the built area increased by about 85% and the spatial distribution sprawled to the north a lot. The other land cover types decreased except grassland. A long with the expansion of the built area, the degree of simplification in land use/land cover was higher and higher, also the intensiveness was becoming higher. Ulaanbaatar city was urbanized very rapidly caused by herders and farmers, many of them migrating from rural places, have played a big role in this built area expansion. Also, economic development, social factors were all attribute to the built area expansion.

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