Analysis of vegetation change and its driving factors in Hunan province based on MODIS NDVI time series data

doi:10.13474/j.cnki.11-2246.2021.0208

Abstract

Abstract: Based on MODIS NDVI time series data set, using Sen+Mann Kendall trend test, Hurst index and correlation analysis methods, the spatiotemporal variation characteristics, evolution trend sustainability and its correlation with climate factors of vegetation in Hunan province from 2000 to 2018 are studied. The results show that:① The vegetation cover in Hunan province is relatively high and has obvious seasonal variation characteristics. The correlation between vegetation and temperature is stronger than precipitation. ② In recent 19 years, NDVI of vegetation in Hunan province showed an increasing trend, with a growth rate of 8.6%/10 a (P<0.001), of which 10.3% and 57.3% are significantly increased. It is mainly distributed in the woodland and cultivated land areas of central Hunan and Northwest Hunan. The decreasing areas are mainly distributed in urban construction areas such as Changsha Zhuzhou Xiangtan and some cultivated land areas of Dongting Lake Plain. ③ In the future, 80.1% of the area in Hunan province will be degraded.

Key words: vegetation cover, dynamic change, climate factors, Hurst, Hunan province

CLC Number:

P237

GUAN Qingdan, ZUO Xiaoqing, LI Shihua, SUN Hao, ZHANG Hang, WANG Hua. Analysis of vegetation change and its driving factors in Hunan province based on MODIS NDVI time series data[J]. Bulletin of Surveying and Mapping, 2021, 0(7): 52-58.

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URL: http://tb.chinasmp.com/EN/10.13474/j.cnki.11-2246.2021.0208

http://tb.chinasmp.com/EN/Y2021/V0/I7/52

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