Land cover changes in the rural-urban interaction of Xi'an region using Landsat TM/ETM data

doi:10.1360/gs050405

Journal of Geographical Sciences ›› 2005, Vol. 15 ›› Issue (4): 423-430.doi: 10.1360/gs050405

• Climate and Environmental Change • Previous Articles Next Articles

Land cover changes in the rural-urban interaction of Xi'an region using Landsat TM/ETM data

JIANG Jianjun, ZHOU Jie, WU Hong'an, AI Li,ZHANG Hailong, ZHANG Li, XU Jun

1. College of Geographical Science, Nanjing Normal University, Nanjing 210097, China;
2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi'an 710075, China

Received:2005-01-17 Revised:2005-04-06 Online:2005-12-25 Published:2005-12-25
Supported by:
European Commission Project, No.ICA4-CT-2002-10004; Knowledge Innovation Project of Chinese Academy of Sciences, No.KZCX3-SW-146

Abstract

Abstract:

Landsat ETM/TM data and an artificial neural network (ANN) were applied to analyse the expansion of the city of Xi'an and land use/cover change of its surrounding area between 2000 and 2003. Supervised classification and normalized difference barren index (NDBI) were used respectively to retrieve its urban boundary. Results showed that the urban area increased by an annual rate of 12.3%, with area expansion from 253.37 km2 in 2000 to 358.60 km2 in 2003. Large areas of farmland in the north and southwest were converted into urban construction land. The land use/cover changes of Xi'an were mainly caused by fast development of urban economy, population immigration from countryside, great development of infrastructure such as transportation, and huge demands for urban market. In addition, affected by the government policy of "returning farmland to woodland", some farmland was converted into economic woodland, such as Chinese goosebeery garden, vineyard etc.

Key words: urban expansion, supervised classification, NDBI, land use/cover changes

JIANG Jianjun, ZHOU Jie, WU Hong'an, AI Li,ZHANG Hailong, ZHANG Li, XU Jun. Land cover changes in the rural-urban interaction of Xi'an region using Landsat TM/ETM data[J].Journal of Geographical Sciences, 2005, 15(4): 423-430.

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Land cover changes in the rural-urban interaction of Xi'an region using Landsat TM/ETM data

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