Gradient Effects of NDVI in Jiangxi Province during 2000-2020
Explore the different gradient distribution rules and influencing factors of vegetation cover change in Jiangxi province,and evaluate the spatial and temporal changes of vegetation,which is helpful to carry out the relevant ecological protection and restoration work in the whole province.By analyzing the NDVI data and using linear model fitting curve method,we studied the variation characteristics of NDVI and its spatial gradient differences in Jiangxi province at different elevations,and investigated the mechanism of natural and human factors on NDVI.The results show that from 2000 to 2020,NDVI in the low altitude area of Jiangxi province showed a rapid growth trend,and the distribution of NDVI showed obvious gradient effect.High vegetation coverage is mainly concentrated in the low altitude area,and the vegetation coverage gradually decreased;in addition,from 2000 to 2020,NDVI was positively correlated with rainfall at different elevations.At different elevations,the influence of human activity on NDVI showed obvious gradient difference,the influence of human activity in high altitude gradually increased,while the effect of cultivated land area is the highest(0.25％),the grassland area is the lowest,while the middle altitude area is mainly woodland(30％-40％),followed by grassland and the highest.The results provide a theoretical basis for the ecological environment construction and sustainable development in Jiangxi province.
normalized difference vegetation index(NDVI)gradient effectinfluencing factortemporal and spatial variationJiangxi province.
国家科技期刊平台
NSTL
万方数据
