水库修建在带来巨大社会经济效益的同时也改变了原有水文模式支持下的生态系统稳定性，可能导致诸多生态环境问题。石羊河流域是我国水资源利用率最高，用水矛盾最为突出的流域，位于该流域的红崖山水库是亚洲最大的人工沙漠水库，自水库建成以来对其水文和生态效应的争论一直存在，探明水库对局地不同水体的影响机制是开展水库水文和生态效应研究的基础。本研究拟以红崖山水库周边和石羊河下游各水体为主要研究对象，以稳定同位素混合分割模型相关算法为基本方法，力求准确识别红崖山水库影响下的水库周边和石羊河下游各水体相互补给、迁移和转化的机制。研究可量化揭示水库建设对石羊河中下游水文过程的影响，提升对水库水文效应的认知水平，对普遍样本上水库建设对水文过程影响的研究具有理论意义，对石羊河流域生态环境，水利设施建设和水资源合理利用具有现实意义。

The construction of the reservoir guarantee water use in production and living in the river basin, which brings great social and economic benefits, and changes the stability of the ecosystem supported by the original hydrological model, leading to many ecological and environmental problems. Shiyang River is the watershed with the highest water resource utilization rate and the most prominent water use conflict in China. The Hongyashan Reservoir is the largest artificial desert reservoir in Asia. The dispute over its hydrological and ecological effects has been existed since its establishment. The impact of reservoir construction on local water bodies is the basis for studying hydrological and ecological effects of water conservancy projects. This study intends to take the water body around the Hongyashan Reservoir and the lower reaches of the Shiyang River as the main research object, and use the algorithm of stable isotope mixture segmentation model as the basic method to accurately identify the mechanism of mutual recharge, migration and conversion of the water bodies between the surrounding reservoir and the lower reaches of Shiyang River under the influence of Hongyashan Reservoir. The study can quantify the impact of reservoir construction on the inland river hydrological process, and improve the cognitive level of the reservoir hydrological effect, as well as provide the theoretical and practical significance for the study of the impact of water conservancy projects on hydrological processes on the general sample. This study also has practical significance for the ecological environment, water conservancy facilities construction and rational utilization of water resources in Shiyang River Basin.