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[1]JIANG Yi,ZHOU Zhongfa,HUANG Denghong.Analysis on Spatial-temporal Variation and Driving Factors of Fractional Vegetation Cover in Qianzhong Water Conservancy Area—Taking Pingba as an Example[J].Research of Soil and Water Conservation,2018,25(06):221-227.

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Analysis on Spatial-temporal Variation and Driving Factors of Fractional Vegetation Cover in Qianzhong Water Conservancy Area—Taking Pingba as an Example

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 221-227 Column: Public date: 2018-10-26

Title:: Analysis on Spatial-temporal Variation and Driving Factors of Fractional Vegetation Cover in Qianzhong Water Conservancy Area—Taking Pingba as an Example

Author(s):: JIANG Yi^1,2, ZHOU Zhongfa^1,2, HUANG Denghong^1,2; 1. Karst Research Institute/Department Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China;
2. State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550001, China

Keywords:: fractional vegetation cover; spatial-temporal variation; soil type; dimidiate pixel model; Pingba County

CLC:: Q948;TP79

DOI:: -

Abstract:: Fractional vegetation cover (FVC) is an important indicator of the regional ecosystem changes in the environment. We used Landsat TM remote sensing data of 2001, 2005, 2010 and 2013, took Pingba County in Qianzhong Water Control Project as the research object，and applied dimidiate pixel model to get the temporal and spatial variation of fractional vegetation cover and discuss the relationship between FVC and landform relief, elevation, slope and soil type and provide scientific basis for the research of soil and water conservation in county. The results showed that：(1) FVC of the study area exhibited a significant increase with the linear tendency of 0.94% per year in 2001—2013; during this period, a stable increase with linear tendency of 1.72% per year) was detected before 2010，followed by a sharp decline with linear tendency of -1.26% per year) after 2010; (2) spatially，FVC showed the pattern of high level in the northwest and the low level in the east. High values of FVC were mainly found in Qibo Township, Leping Township and Shizi Township. Low values of FVC were mainly found in Gaofeng Town, Machang Town and Xiayun Town. In 2001—2013, FVC in Tianlong Town decreased drastically, but increased sharply in Machang Town and Yangchang Township; (3) The relationship between FVC and topographic factors in Pingba County showed that the types of FVC mainly distributed in landform with felief of < 80 m, the elevation of 1 200~1 400 m and the slope of < 25°; (4) The analysis of the change of FVC in different soil types showed that FVC of yellow brown soil was the highest (70.4%)， FVC of paddy soil was the lowest(42.9%). In each soil type area，the area with high FVC showed the largest percentage increase while the area with low FVC had the largest percentage decrease.

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