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通过对巴丹吉林沙漠湖泊和地下水氢氧同位素分析,讨论了沙漠湖水和地下水的补给关系,并结合地下水可溶性固体总量的特征,进一步探讨了巴丹吉林沙漠的蒸发特性。根据氢氧同位素的分析结果,本研究区的蒸发趋势线方程为:δD=4.1δ18O-30.02‰(n=37,R2=0.94)较低的斜率显示了巴丹吉林沙漠强烈的蒸发环境特征。巴丹吉林沙漠东南部湖泊和地下水具有相似的蒸发趋势,推测两者之间存在补给关系。根据沙漠腹地地下水氧同位素值富集程度高于东南部地下水氧同位素值的特点,得出前者蒸发较后者强烈。进而对比其他干旱条件下盐湖的蒸发,结果显示巴丹吉林沙漠湖水存在过度蒸发效应。
Based on the analysis of hydrogen and oxygen isotopes in the Badain Jaran Desert Lake and groundwater, the relationship between the supply of desert lake water and groundwater is discussed. Combined with the characteristics of groundwater total soluble solids, the evaporation characteristics of Badain Jaran Desert are further discussed. According to the results of hydrogen and oxygen isotope analysis, the evaporation trend line equation in this study area is: δD = 4.1δ18O-30.02 ‰ (n = 37, R2 = 0.94) The lower slope shows the strong evaporation environment characteristics of Badain Jaran Desert. Lakes and groundwater in the southeastern part of Badain Jaran Desert have a similar trend of evaporation, suggesting that there is a supply relationship between the two. According to the characteristics of oxygen isotope enrichment of groundwater in the desert hinterland is higher than the oxygen isotope value of groundwater in the southeastern part, it is concluded that the former is stronger than the latter. Then compare the evaporation of salt lakes under other drought conditions, the results show that the Badain Jaran Desert Lake water over-evaporation effect.