Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat

ZHAO Hao-tian; WANG Lin-qing; ZHENG Yong; XIE Tian-zi; JIANG Yu-xuan; GONG Gu-tang; LUO Zong-shi; CHEN Jun-hua

doi:10.16779/j.cnki.1003-5508.2019.05.005

Based on Landsat TM/OLI series remote sensing data, NDVI values were extracted by RS and GIS, and vegetation FVC grading maps of Qingshen county in 2009, 2013 and 2018 were obtained by pixel binary model, and their dynamic changes were analyzed by transfer matrix and difference method. The results showed that the vegetation coverage in Qingshen county was generally good, and the vegetation coverage was mainly above medium and high.In 2009-2013, the 71.73% medium and high vegetation coverage in the region above derceased to 62.69%,and the proportion of the total improvement in 2018 accounted for 67.77% of the total area,showing that the vegetation coverage shows in Qingshen county from 2009 to 2018 experienced degradation before improving trend, but overall the small-amplitude degradation.The degradation area was more 6.22 km² than the improve area, accounting for 1.6% of the total area. According to the analysis, the expansion of urban areas and the construction of infrastructure encroached on the cultivated land and forest land, which was the main cause of vegetation coverage degradation in Qingshen county. In order to promote the sustainable development of regional ecological environment, the vegetation coverage in and around the central city should be further improved.

Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat

1. College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu 610059, China;

2. Forestry and Landscape Bureau of Qingshen County, Sichuan Province, Qingshen 620460, China;

3. Sichuan Academy of Forestry, Chengdu 610081, China

Received Date: 2019-07-19

Key words:

Abstract: Based on Landsat TM/OLI series remote sensing data, NDVI values were extracted by RS and GIS, and vegetation FVC grading maps of Qingshen county in 2009, 2013 and 2018 were obtained by pixel binary model, and their dynamic changes were analyzed by transfer matrix and difference method. The results showed that the vegetation coverage in Qingshen county was generally good, and the vegetation coverage was mainly above medium and high.In 2009-2013, the 71.73% medium and high vegetation coverage in the region above derceased to 62.69%,and the proportion of the total improvement in 2018 accounted for 67.77% of the total area,showing that the vegetation coverage shows in Qingshen county from 2009 to 2018 experienced degradation before improving trend, but overall the small-amplitude degradation.The degradation area was more 6.22 km² than the improve area, accounting for 1.6% of the total area. According to the analysis, the expansion of urban areas and the construction of infrastructure encroached on the cultivated land and forest land, which was the main cause of vegetation coverage degradation in Qingshen county. In order to promote the sustainable development of regional ecological environment, the vegetation coverage in and around the central city should be further improved.

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Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat

doi: 10.16779/j.cnki.1003-5508.2019.05.005

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