| Ecology and Economics |
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| Remote Sensing Monitoring and Driving Factor Analysis on Land Use and Land Cover Changes of Bayin River Basin in Qinghai Province |
| YAN Ying-cun, XIAO Rui-xiang, XIAO Jian-she, LIU Bao-kang, LI Fu, FU Yang, GUO Guang |
| Qinghai Meteorological Science Institute, Xining 810001, China |
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Abstract Based on Landsat-TM remote sensing images of 1988 and 2006 and climatic data during 1980—2007, the present condition, trends and driving factors of land use and land cover change (LUCC) in Bayin river basin of Qinghai Province were studied. Results showed that, from 1980 to 2007, precipitation increased by 12.9 mm/10a, sunshine duration reduced by 83.3 h/10a, and the average annual temperature and the 0-cm ground temperature increased by 0.6 ℃/10a and 0.8 ℃/10a in Bayin River Basin. In such a climate background, unused land was most widely distributed, the area of unused land accounted for 71.43 percent of the area of the Bayin River Basin. From 1980 to 2007, urban land, agricultural land and grassland area increased; unused land area also increased, among the unused lands, bare rock, wasteland, salt-alkali land, sandy land area significantly increased, and their increase rates were 6.28, 5.82, 2.76 km2·a-1 and 0.21 km2·a-1, respectively. Wetland areas decreased, in which, glacier, lake, reed land, marsh and river areas significantly decreased, and the decrease rates were 12.13, 0.43, 0.41, 0.27 km2·a-1 and 0.21 km2·a-1, respectively. The grey relationship coefficients of sunshine duration or precipitation with various types land area of Bayin River Basin were in range of 0.667～0.997 and 0.668～0.986, respectively; the grey relationship coefficients of temperature or 0-cm ground temperature with various types land area were relatively 0.669～0.835 and 0.667～0.856. Precipitation is the main driving factor of ecological area changes, which followed by sunshine duration, temperature and 0-cm ground temperature. Unreasonable use of water has promoted land desertification in Bayin river basin.
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Received: 12 April 2011
Published: 20 January 2012
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Cite this article:
YAN Ying-cun, XIAO Rui-xiang, XIAO Jian-she, LIU Bao-kang, LI Fu, FU Yang, GUO Guang. Remote Sensing Monitoring and Driving Factor Analysis on Land Use and Land Cover Changes of Bayin River Basin in Qinghai Province. JOURNAL OF DESERT RESEARCH, 2012, 32(1): 276-283.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I1/276
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