气候变异和人类活动共同作用下黄河流域陆地水储量时空演变及归因

气候变异和人类活动对流域水文循环过程的影响是水文研究者和水资源管理者长期关注的热点问题之一。本项目以黄河流域为研究区域，开展气候变异和人类活动共同作用下的陆地水储量时空演变分析及归因研究。内容包括：基于GRACE/GRACE FO重力卫星数据反演黄河流域陆地水储量变化过程，探明该流域在2003-2020年间的陆地水储量时空演变规律；考虑典型人类活动对黄河流域水文过程的影响，基于改进的VIC模型来模拟不同情景下的流域水文循环过程，揭示气候变异和典型人类活动对陆地水储量的影响机制；提出陆地水储量贡献指数来定量评估气候变异和典型人类活动对黄河流域内陆地水储量变化的贡献作用。预期研究成果对理解气候变异和人类活动共同作用下的黄河流域生态水文过程及陆地水储量演变过程具有重要的科学意义，并为该流域水资源可持续发展和精细化管理提供科学参考和理论支撑。

Analyzing the responses of hydrological cycles to the joint effects of climatic variability and anthropogenic activities has been one of the major issues on which the hydrological researchers and managers care about. This project mainly aims to characterize the spatial-temporal variation of TWS across the Yellow River basin (YRB) and investigate the underlying mechanism for TWS changes. Detailed contents of this project are given as follows: (1) analyze the spatial-temporal variation of TWS across the Yellow River basin (YRB) based on GRACE and GRACE FO satellites data. (2) considering the influences of anthropogenic activities on hydrological cycles, we simulate the hydrological process under different scenarios based on an improved distributed hydrological model and reveal the mechanism about how climatic variability and anthropogenic activities influence the variation of TWS. (3) A novel index is proposed to assess the contributions of different factors from climatic variability and anthropogenic activities to the variation of TWS. The conclusions drawn from this study can serve as a good basis for understanding hydrological cycles in the YRB and provide valuable guidance for decisions-makers in making right polices for the sustainable development and water resources assessments.