中南林业科技大学学报2025，Vol.45Issue(4)：108-118,161,12.DOI:10.14067/j.cnki.1673-923x.2025.04.010
湖南省 2000-2020年NDVI时空动态变化及其驱动力分析
Temporal and spatial dynamics of NDVI and its driving force analysis in Hunan Province from 2000 to 2020
摘要
Abstract
[Objective]In-depth investigation of the spatial and temporal evolution characteristics of vegetation sequences and their driving factors can deepen our understanding of the dynamic change law of vegetation,so as to scientifically and reasonably plan the natural natural development,optimize the spatial utilization of the national territory as well as effectively protect the ecological environment with crucial theoretical and practical values.[Method]In this study,based on the NDVI data,natural factors(surface factors and climate factors)and human factors from 2000 to 2020 in Hunan Province,the response of each influencing factor to the NDVI of vegetation was investigated by combining the Theil-Sen+Mann-Kendall trend analysis,bias correlation analysis,time-lagged bias correlation analysis,and geodetector model.[Result]1)The vegetation NDVI in Hunan Province showed an increasing trend in spatial and temporal changes during the past 21 years,and the NDVI fluctuated at a rate of 0.0015/a at the interannual scale;spatially,78%of the area showed an increasing trend,and the increasing areas were all over the province,while the degraded areas were mainly concentrated in the Dongting lake basin and the fast developing urban center;2)The influence of air temperature on NDVI in Hunan Province is stronger than that of precipitation.The lag time and accumulation time of temperature on NDVI are both 0 month,while the lag time of precipitation is 1 month and the accumulation time is two months;3)The factors that have the greatest influence on the NDVI of vegetation in Hunan Province are geomorphology air temperature,land use type and precipitation.Meanwhile,with the continuous development of economy and society,the influence of population density,GDP and land use type on NDVI is increasing.[Conclusion]From 2000 to 2020,vegetation NDVI in Hunan Province has shown a significant improvement trend in terms of spatiotemporal changes,with both natural factors(topography,temperature)and human factors(land use type)having a significant impact on vegetation NDVI.In addition,with the rapid development of the economy and society,the impact of population density,GDP,and land use type on vegetation NDVI in the human factor is continuously increasing,and this phenomenon is particularly prominent in rapidly urbanized areas.关键词
NDVI/时空变化/地理探测器/时滞效应/湖南省Key words
NDVI/spatial and temporal variability/geoprobes/time lag effect/Hunan Province分类
农业科技引用本文复制引用
佘宇晨,张云峰,陈楚琳..湖南省 2000-2020年NDVI时空动态变化及其驱动力分析[J].中南林业科技大学学报,2025,45(4):108-118,161,12.基金项目
湖南省自然科学基金项目(2022JJ40875). （2022JJ40875）
