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[1]CHEN Cheng,YANG Donghao,WANG Jianxiong,et al.Analysis on Dynamic Change Characteristics and Driving Forces of Vegetation Coverage in Southwestern Yunnan[J].Research of Soil and Water Conservation,2022,29(04):198-206.

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Analysis on Dynamic Change Characteristics and Driving Forces of Vegetation Coverage in Southwestern Yunnan

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 198-206 Column: Public date: 2022-06-20

Title:: Analysis on Dynamic Change Characteristics and Driving Forces of Vegetation Coverage in Southwestern Yunnan

Author(s):: CHEN Cheng, YANG Donghao, WANG Jianxiong, LI Yaqiang, XIN Jingda; (Yunnan Universities Agricultural Remote Sensing and Precision Agriculture Engineering Research Center, College of Water Conservancy, Yunnan Agricultural University, Kunming 650210, China)

Keywords:: southwestern Yunnan; vegetation coverage; trend analysis; correlation analysis; human activities; climate change

CLC:: Q948.15

DOI:: -

Abstract:: In order to explore the dynamic change of vegetation coverage and its relationship with climate factors in southwest Yunnan, so as to promote the protection and sustainable development of vegetation resources in southwest Yunnan. Based on the MODIS NDVI data from 2000 to 2020 in southwest Yunnan and the meteorological data in the same period, the analysis was carried out by using the methods of pixel dichotomy, transfer matrix, linear trend analysis, correlation analysis and residual analysis. The results show that:(1)in recent 21 years, the low vegetation coverage gradually transformed to high vegetation coverage in southwest Yunnan, and the vegetation coverage in southwest Yunnan showed an overall improvement trend from 2000 to 2020;(2)the cumulative precipitation in southwest Yunnan in recent 21 years decreased by 94.18 mm/decade; the average annual temperature generally showed an upward trend of 0.78℃/decade;(3)the vegetation coverage in southwest Yunnan was mainly more closely related to the change of temperature; the areas where correlations between FVC and temperature were positive and negative accounted for 58.47% and 41.53% of the whole study area, respectively; The areas where correlations between FVC and precipitation were positive and negative accounted for 41.22% and 58.78% of the whole study area, respectively;(4)temperature driver was the main driving factor of vegetation coverage in southwest Yunnan, accounting for 2.94% of the study area; precipitation-driven area accounted for 1.76%; temperature and precipitation-driven area accounted for 2.66%;(5)in recent 21 years, the residual value of southwest Yunnan had fluctuated and increased at the growth rate of 0.021/decade. From 2000 to 2020, the impact of human activities on vegetation in southwest Yunnan changed from negative to positive effect, and 2009 was a turning point from negative to positive effect.

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Last Update: 2022-06-20