中文摘要：

定量研究干旱区地下水的咸化机制对于水资源管理具有重要意义。针对已有研究需要考虑补给源水δ18O和δ2H值的局限,提出了一种利用区域氘盈余计算初始水、蒸发和溶滤对地下水咸化贡献的方法,并以罗山地区第四系地下水为例进行了分析。结果表明：该方法计算误差较小,可以有效区分蒸发和溶滤的贡献。地下水先溶滤后蒸发的自然咸化过程决定了溶滤作用的主导地位,咸化规模主要取决于溶滤作用程度。

英文摘要：

Quantitative studies of groundwater salinization mechanism in arid areas are of important significance for water resources management. Since the limitation that the δ18O and δ2H values of recharge water are difficult to be obtained,this paper proposes a method for calculating the contribution of recharge water,evaporation and dissolution to groundwater salinization using the regional deuterium excess,and the Quaternary groundwater in the Luoshan Mountain area are taken as a case study. The results show that the calculation error of this method is small,and it can effectively distinguish the contribution between evaporation and dissolution. The natural groundwater salinization processes of first dissolution and then evaporation make sure the dominant role of the dissolution effect,and the scale of salinization depends mainly on the dissolution extent.