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[1]MA Cai-hong.Assessment on Spatiotemporal Ecological Risk in Loess Highland Region of Shaanxi Province[J].Research of Soil and Water Conservation,2014,21(05):216-220.

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Assessment on Spatiotemporal Ecological Risk in Loess Highland Region of Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 05 Page number: 216-220 Column: Public date: 2014-10-28

Title:: Assessment on Spatiotemporal Ecological Risk in Loess Highland Region of Shaanxi Province

Author(s):: MA Cai-hong; School of History and Tourism, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, China

Keywords:: land use; land use change flow; land ecological risk; loess highland region of Shaanxi

CLC:: X826

DOI:: -

Abstract:: Based on RS and GIS, this paper used the index of land transfer flow and land ecological risk to analyze the land use change dynamic and to assess land structure ecological risk during 1990—2010. The results are as the follows. The built-up land enlarged in each loess highland region at city scale, the cultivated land reduced except in loess highland region of Baoji and loess highland region of Xi’an. Land use ecological risk index presented the pattern of ‘high—low—high’ during the study period, and the year of 1995 was the turning point. At city scale, loess highland region of Baoji and loess highland region of Xi’an enlarged very much since 1995, the value was up to ‘high’ ecological risk grade since 2005. At county scale, the ecological risk grew except Baishui County and Yongshou County, and the difference among the counties enlarged during 1990—2010. The variation coefficients of land structure risk were 10.43%, 10.57% and 10.79% at 1990, 2000 and 2010, respectively.

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