祁连山区不同水体中稳定氢、氧同位素相互关系及其水文过程研究

不同水体中稳定氢、氧同位素研究是全球变化研究的前缘和热点之一。由于受水分提取技术、分析测试手段和样品采集条件等的限制，我国山区不同水体中稳定氢、氧同位素相互关系及其水文过程研究非常薄弱。本项研究拟以祁连山为研究区域，依托分布于祁连山区的10个国家地面气象观测站收集降水样品，并通过高密度和长时间同期采集河水、地下水、土壤和植物样品，利用LI-2000植物土壤水分真空抽提系统提取土壤和植物中的水分，通过DLT-100液态水同位素分析仪测量样品中的18O/16O和D/H同位素的比率，进行祁连山区降水、河水、地下水、土壤水和植物水等不同水体中稳定氢、氧同位素时空分布特征及其相互关系的研究。旨在搞清祁连山区不同水体中稳定氢、氧同位素的时空分布规律、相互关系及其反映的水文过程，为区域水循环过程和全球变化研究做出贡献。

The stable hydrogen and oxygen isotopes in different types of water are one of the leading edges and hot topics in global change research. Restricted by the extractive technique, analysis method and sampling procedure, the previous study on relationships of stable isotopes among different types of water in the mountainous regions of China is still limited. In order to investigate the stable hydrogen and oxygen isotopes in the high-altitude Qilian Mountains, the event-based precipitation can be sampled in 10 national meteorological stations at the mountainous regions, and river water, ground water, soil and plant samples are also intended to be collected with high resolution and long term. These samples can be analyzed for 18O/16O and D/H using liquid water isotope analyzer model DLT-100, with the help of plant and soil water vacuum extraction system model LI-2000. This research aims for improving the understanding on the spatio-temporal distribution and interrelation of the stable isotope among different types of water (precipitation, river water, ground water, soil water and plant water) as well as the internal hydrological process, which is a potential contribution to the regional water cycle and global change research.