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研究张掖盆地的地下水流动系统,对于合理开发当地地下水资源,提高水文地质研究程度,具有重要意义。环境同位素技术已广泛应用于水文地质研究中,对于研究地下水补给来源、地下水循环等有重要帮助。2014年在张掖盆地开展了水文地质调查和研究,采取了大量不同位置、不同深度的环境同位素样品,结合前人在该地区的研究成果,进行了氘氧同位素分析,研究结果表明:(1)祁连山区水体和龙首山区水体的氘氧同位素值有明显差异,并导致下游地下水的氘氧同位素值表现出明显差异;(2)从张掖盆地地下水上游至下游,存在深部循环带,并根据同位素的分布划分了张掖盆地不同区域的地下水流动系统,得出了张掖盆地的地下水流动系统概念模型。
Studying the groundwater flow system in Zhangye basin is of great significance for the rational development of local groundwater resources and improvement of hydrogeological research. Environmental isotope techniques have been widely used in hydrogeological research, and are of great help in studying sources of groundwater recharge and groundwater circulation. In 2014, hydrogeology investigation and research were carried out in the Zhangye basin. A large number of environmental isotope samples with different positions and depths were taken. Deuterium and oxygen isotope analysis was carried out based on the previous research results in the area. The results show that: (1) The deuterium and oxygen isotope values of water bodies in Qilian Mountains and Longshanshan Mountain have significant differences, and the deuterium and oxygen isotope values of groundwater in downstream show obvious differences. (2) From the upstream to the downstream of groundwater in Zhangye basin, The groundwater flow system in different areas of Zhangye basin is divided and the conceptual model of groundwater flow system in Zhangye basin is obtained.