Vegetation cover change and its response to water and heat conditions in the growing season in Liupanshan poverty-stricken area

doi:10.6046/gtzyyg.2020280

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Abstract

Based on the MODIS13Q1,MODIS11Q2 data and national meteorological station monitoring data and using the methods of maximum value synthesis, the average two pixel model and partial correlation analysis, the authors analyzed the temporal and spatial variation trend of vegetation coverage in the growing season and the interaction of land surface temperature and soil moisture on vegetation growth. The results are as follows: ① From 2001 to 2018, the vegetation coverage of Liupanshan poverty-stricken area increased from 0.28 to 0.45, and showed a decreasing pattern from southeast to northwest. ② During the research period, there existed a trend of overall improvement and local degradation: the improved area accounted for 51.91%, the area without significant change accounted for 44.22%, and the degraded area accounted for 3.87%. ③ The growth of vegetation is closely related to the annual change of land surface temperature and soil moisture. There are three types of spatial correlation: positive correlation, negative correlation and reverse correlation, but the positive correlation is dominant. ④ The interaction analysis shows that the influence of soil moisture on vegetation growth is greater than that of land surface temperature. Soil moisture condition is the dominant factor affecting the vegetation growth in this area. The improvement of soil moisture condition is very important for the construction and restoration of ecological environment in the study area.

Keywords change of vegetation cover growing season partial correlation analysis land surface temperature soil moisture

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Corresponding Authors: MA Caihong E-mail: yuanqy166@163.com;mchyanni@163.com

Issue Date: 21 July 2021

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	Qianying YUAN
	Caihong MA
	Qi WEN
	Xuemei LI

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Qianying YUAN,Caihong MA,Qi WEN, et al. Vegetation cover change and its response to water and heat conditions in the growing season in Liupanshan poverty-stricken area[J]. Remote Sensing for Land & Resources, 2021, 33(2): 220-227.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020280 OR https://www.gtzyyg.com/EN/Y2021/V33/I2/220

Fig.1 Study area

Tab.1 Classification standard of vegetation coverage

Fig.2 Annual changes of vegetation coverage in growing season in Liupanshan poverty area from 2001 to 2018

Fig.3 Spatial pattern of vegetation cover in growing season in Liupanshan poverty area in 2018

Fig.4 Vegetation coverage in growing season in Liupanshan poverty area

Fig.5 Standardized index of growing season vegetation coverage, land surface temperature and soil moisture in Liupanshan poverty area

Fig.6 Partial correlation between vegetation coverage and land surface temperature and soil moisture in 2018 growing season

Fig.7 Interaction of land surface temperature and soil moisture on vegetation coverage in 2018 growing season

Tab.2 Correlation of land surface temperature and soil humidity on vegetation coverage in 2018 growing season

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