中文摘要：

在在 Shule 河盆的降水的稳定的同位素和离子的分发，西北的中国，被调查理解到地下水的地区性的水周期和降水输入再装。学习发现 Ca ²⁺, Na ⁺, 的吝啬的年度集中那么在盆的 ₃^-, 和 K ⁺ 都不是的 ₄^2-, Cl ^-, Mg ²⁺, 比那些低在西北的中国的另外的干旱区域。在 Shule 河的更低的活动范围的离子的平均集中比在上面的活动范围的那些高。结果证明主要离子的集中随降水数量的增加减少了，显示重降水不能仅仅洗从空气的外壳的喷雾器，而且创造冲淡效果。在降水的 Cl ^- 和 Na ⁺ 有强壮、积极的关联，建议为二个离子的普通起源。然而， Na ⁺, 的过量与结合了非海洋 ₄^2- 和没有 ₃^-, 因此显示一些离子被陆上的起源贡献。在西北的中国的极其干旱的区域，蒸发进程显然改变在 ² H 和 ¹⁸ 在降水的 O，并且导致 dexcess 值 < 8。¹⁸ O 和温度显著地被相关，建议温度强烈在学习区域影响了同位素的特征。¹⁸ O 价值在温暖的月内显示西的空气群众和西南季风的主导的效果，并且西、西伯利亚蒙古的极的空气的综合影响集中在冷月内。d 过量价值比在冷月内的那些在温暖的月内通常是更低的，显示冷凝作用以后的过程起了在水周期的一个重要作用。结果提供能在未来地下水被使用的可靠降水输入信息再装在学习区域的计算。

英文摘要：

The distribution of stable isotopes and ions in precipitation in the Shule River Basin, northwestern China, were investigated to understand the regional water cycle and precipitation input to groundwater recharge. The study found that the mean annual concentrations of Ca2＋, Na＋, SO42-, CI-, Mg2＋, NO3-, and K＋ in the basin were lower than those in other arid areas of northwestern China. The average concentrations of ions in the lower reaches of the Shule River were higher than those in the upper reaches. The results showed that the main ionic concentrations decreased with the increase of precipitation amount, indicating that heavy precipitation cannot only wash crustal aerosols out of the atmosphere, but also create a dilution effect. CI- and Na＋ in precipitation had a strong and positive correlation, suggesting a common origin for the two ions. However, the excess of Na＋, combined with non-marine SO42- and NO3-, indicated that some ions were contributed by terrestrial origins. In the extremely arid regions of northwestern China, the evaporation process obviously changes the original relationship between δ2H and δ18O in precipitation, and leads to dexcess values 〈8‰. δ18O and temperature were significantly correlated, suggested that temperature strongly affected the characteristics of isotopes in the study area. The δ18O value indicates a dominant effect of westerly air masses and southwest monsoon in warm months, and the integrated influence of westerly and Siberian-Mongolian polar air masses in cold months. The d-excess values were generally lower in warm months than those in cold months, indicating that post-condensation processes played a significant role in the water cycle. The results provide reliable precipitation input information that can be used in future groundwater recharge calculations in the study area.