[1]JING Juan-li,WANG Yong-feng.Temporal and Spatial Variation of Vegetation Cover in Southwest China Karst Area during 1998-2012[J].Research of Soil and Water Conservation,2014,21(04):163-167.

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Temporal and Spatial Variation of Vegetation Cover in Southwest China Karst Area during 1998-2012

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 04 Page number: 163-167 Column: Public date: 2014-08-28

Title:: Temporal and Spatial Variation of Vegetation Cover in Southwest China Karst Area during 1998-2012

Author(s):: JING Juan-li, WANG Yong-feng; College of Geomatics and Geoinformation, Guilin University of Technology, Guilin, Guangxi 541004, China;Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin, Guangxi, 541004, China

Keywords:: southwest China Karst area; SPOT-VEGETATION; change vector analysis; trend analysis; Mann-Kendall non-parametric test

CLC:: X87

DOI:: -

Abstract:: Temporal and spatial variation of vegetation cover in southwest China karst area during 1998—2012 has been studied based on the SPOT-VEGETATION data set by using the methods of the maximum value composite (MVC), change vector analysis (CVA), slope of the linear regression and Mann-Kendall non-parametric test. Results show that: (1) the SPOT-VEGETATION index time series data can monitor the vegetation coverage changes in southwest China karst area on a large scale; (2) during the period of 1998—2012 the maximum annual NDVI rose, the whole vegetation conditions were improved, about 71.85% of the total area had different degrees of improvement, mainly distributed in Guizhou province, Yunnan province and Guangxi Zhuang Autonomous Region. There were areas where vegetation cover had degenerated markedly, mainly distributed in Sichuan and Yunnan province, vegetation conditions accounting for 27.62% of the total area remained essentially invariant; (3) the CVA for the 14 a scale showed that areas with mid-high to high degree of vegetation type change accounted for 54.17% of the study area, the comparison of CVA for the two 7 a periods showed that the density and extent of vegetation cover change between 1999 and 2005 was much acute than that between 2006 and 2012, the former is 1.82 times of the latter; (4) results of change slope method are basically identical to Mann-Kendall non-parametric test.

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