Arid zone ecosystems, integral to terrestrial systems, exhibit relatively low stability and are prone to influences from human activities and climate change. To elucidate the influence on the ecological environment of the arid zone by climate change and human activities, the paper takes normalized difference vegetation index (NDVI) as an evaluation index of the ecosystem and uses trend analysis to evaluation of NDVI variation characteristics in the Shiyang River Basin (SRB) from 1990 to 2020. Simultaneously using methods such as partial correlation analysis and residual analysis to evaluate the impact of climate change and human activities on NDVI changes. This study yielded several key findings: (1) The NDVI in the SRB exhibits an increasing trend of 0.034/10a in the interannual variation. (2) The relation cooperatives between NDVI and the deviation of precipitation and temperature in the SRB range from −0.735 to 0.770 and −0.602 to 0.773, respectively. (3) The changes in land use and groundwater depth in the SRB have a certain impact on NDVI changes. (4) The proportion of areas with significant contributions (contribution rate greater than 60%) from climate change and human activities to NDVI change is 33.5% and 22.5%, respectively.

中文翻译：

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气候变化和人类活动对干旱区NDVI的影响研究——以石羊河流域为例

干旱区生态系统是陆地系统的组成部分，其稳定性相对较低，容易受到人类活动和气候变化的影响。为阐明气候变化和人类活动对干旱区生态环境的影响，以归一化植被指数（NDVI）作为生态系统评价指标，采用趋势分析法评价石羊河NDVI变化特征。 1990-2020年流域（SRB）。同时利用偏相关分析、残差分析等方法评估气候变化和人类活动对NDVI变化的影响。本研究得出以下几个主要结论：（1）SRB NDVI年际变化呈现0.034/10a的增加趋势。 (2) NDVI与SRB降水和气温偏差的协同关系分别为-0.735~0.770和-0.602~0.773。 (3)SRB土地利用和地下水埋深变化对NDVI变化有一定影响。 （4）气候变化和人类活动对NDVI变化贡献显着（贡献率大于60%）的地区比例分别为33.5%和22.5%。