水利水电技术（中英文）2025，Vol.56Issue(4)：70-81,12.DOI:10.13928/j.cnki.wrahe.2025.04.006
渭河流域净初级生产力遥感反演及变化归因分析
Remote sensing inversion of net primary productivity and change attribution analysis in the Weihe River Basin
摘要
Abstract
[Objective]Aiming at revealing the synergistic impacts of climate change and anthropogenic activities on vegetation ecology,the spatiotemporal dynamics of net primary productivity(NPP)in the Weihe River Basin since the implementation of the ecological restoration policy in 2000 are explored,which provide a theoretical basis for the ecological conservation and sustainable development of the region.[Methods]Based on the Google Earth Engine(GEE)cloud platform,MOD17A3HGF6.1 datum are utilized to investigate the spatiotemporal distribution patterns of NPP,CPP,and VPG.By constructing six vegetation change scenarios,it examines the influence mechanisms of climatic factors and human interventions on vegetation changes.The contributions of each factor were quantitatively evaluated using least squares regression,Pearson correlation analysis,and contribution indices.[Results](1)From 2000 to 2023,NPP in the Weihe River Basin exhibited unimodal seasonal fluctuations,with an average annual increase of 9.91 gC·m-·a-1,and demonstrated a spatial gradient of"higher in the south,lower in the north".(2)During the vegetation restoration phase,temperature and precipitation were positively correlated with vegetation growth,with correlation coefficients of 0.26 and 0.43,respectively.Solar radiation displayed a marginal positive correlation in vegetation restoration driven by human activity,with a correlation coefficient of 0.12.Population density and road density accounted for approximately 34.77％of the restored vegetative area.(3)In the vegetation degradation phase,precipitation was responsible for 30.43％of the vegetation decline,with correlation coefficients for population density and road density reaching 0.71 and 0.64,respectively.[Conclusion]Throughout the study period,NPP in the Weihe River Basin exhibited a general upward trajectory.Climate variables such as temperature and precipitation,population and road density,exert substantial influence on NPP,while solar radiation has a comparatively limited effect.Climate change emerges as the predominant driver of vegetation restoration,while human interventions such as ecological restoration efforts significantly enhance regional vegetation productivity.关键词
净初级生产力(NPP)/气候生产潜力(CPP)/气候变化/人类活动/渭河流域/影响因素Key words
net primary productivity(NPP)/climate potential productivity(CPP)/climate change/human activities/Weihe River Basin/influencing factors分类
资源环境引用本文复制引用
潘鹏飞,潘飞燕,张海旭,金裕..渭河流域净初级生产力遥感反演及变化归因分析[J].水利水电技术（中英文）,2025,56(4):70-81,12.基金项目
国家自然科学基金委员会青年科学基金项目(62003313) （62003313）
河南省重点研发与推广专项(科技攻关)项目(232102241008) （科技攻关）
