应用氢、氧同位素研究苏干湖盆地大、小苏干湖湖水补给来源

苏干湖盆地是嵌套在柴达木盆地中的一个封闭盆地,大、小苏干湖是盆地地表水和地下水的汇集中心,两湖相距20km,但大苏干湖为咸水湖、小苏干湖为淡水湖。文章通过氢、氧同位素分析盆地中大、小苏干湖湖水补给来源,解释了两湖虽近,但矿化度差别较大的原因。为解决敦煌盆地地下水资源短缺问题,政府部门计划从苏干湖盆地地下水的主要补给源——大哈尔腾河引水至党河当中,但湖水补给源的不同,导致引水对两湖影响不一。结果表明,大苏干湖湖水补给来源为大、小哈尔腾河上游4 800m以上冰雪融水补给,且径流路径长,蒸发强烈。小苏干湖主要由来自党河南山西段和阿尔金山区雨水补给,径流路径短。因此,大、小苏干湖矿化度差别较大,补给源的不同导致引水对大苏干湖湖水影响较大,而对小苏干湖湖水影响较小。

Research on Waterin Supplying Resources of Big and Small Sugan Lake Sugan Lake Basin by Using Hydrogen and Oxygen Isotope

Big and small Sugan Lake are the collecting centers of surface water and groundwater of Sugan Lake Basin which is a closed basin embedded in the Tsaidam Basin.Though there are only 20 kilometers be-tween two lakes,but the big Sugan Lake is a salt water lake,small Sugan Lake is a fresh lake.Replenishment sources of the lake water in big Sugan Lake and small lake are analyzed by stable isotope of 2H and 18O in this paper so as to explain the reason why two lakes are nearby,but salinity has great difference.Go...