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

作　　者：佘宇晨 张云峰 陈楚琳 SHE Yuchen;ZHANG Yunfeng;CHEN Chulin(South Central Surveying and Planning Institute of National Forestry and Grassland Administration,Changsha 410014,Hunan,China;Huaihua Forestry Bureau,Huaihua 418000,Hunan,China;Central South University of Forestry&Technology,Changsha 410004,Hunan,China)

机构地区：[1]国家林业和草原局中南调查规划院,湖南长沙410014 [2]怀化市林业局,湖南怀化418000 [3]中南林业科技大学,湖南长沙410004

出　　处：《中南林业科技大学学报》2025年第4期108-118,161,共12页Journal of Central South University of Forestry & Technology

基　　金：湖南省自然科学基金项目(2022JJ40875)。

摘　　要：【目的】探究植被序列的时空演变特性及其驱动因子,深化对植被动态变化规律的认识,科学合理地规划自然资源开发、优化国土空间利用以及有效保护生态环境。【方法】以湖南省为例,基于2000—2020年NDVI、自然因素(地表和气候因子)和人文因素数据,结合Theil-Sen+Mann-Kendall趋势分析、偏相关分析、时滞偏相关分析和地理探测器模型等方法探究各影响因素对植被NDVI的响应。【结果】1)2000—2020年湖南省植被NDVI在时空变化上均呈上升趋势,在年际尺度上NDVI以0.0015/a的速率波动上升;空间上,有78%的区域呈增长趋势,增长区域遍布全省,而退化区域主要集中在洞庭湖流域及发展较为迅速的城市中心;2)湖南省气温对NDVI的影响要强于降水,气温对NDVI的滞后和积累时间均为0个月;而降水量的滞后时间为1个月,积累时间为2个月;3)对湖南省植被NDVI影响最大的因子分别为地貌、气温、土地利用类型。同时,随着经济社会的不断发展,人口密度、GDP和土地利用类型对NDVI的影响不断增大。【结论】2000—2020年湖南省植被NDVI在时空变化上呈显著改善趋势,自然因素(地貌、气温)和人文因素(土地利用类型)对植被NDVI均有较为显著的影响。此外,随着经济社会快速发展,人口密度、GDP和土地利用类型等人文因素对植被NDVI的影响力逐渐增大,这一现象在快速城市化区域表现尤为突出。【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)havi

关 键 词：NDVI 时空变化 地理探测器 时滞效应 湖南省 

分 类 号：S718.5[农业科学—林学]