Nowadays, climate changes and increased water demand for human and agricultural purposes pose important questions for the groundwater management of alluvial aquifers facing the northern Italian Apennines. The large groundwater withdrawals, coupled with an overall worsening of the water quality, requires a detailed knowledge of the recharge mechanisms of these aquifers that can be useful for further adaptation measures. Concerning the recharge area of the alluvial aquifers (i.e., apices made up of gravelly materials), the present study investigates a dataset made up of 282 water samples for which stable isotopes oxygen-18 (18O) and deuterium (2H) are available. The latter involves precipitations (three rain gauges), surface water (five rivers) and groundwater (twenty wells) from five selected alluvial fans. The study confirms that the different isotopic signatures characterizing rain and river water from this area can be exploited for preliminary characterization of their significance on groundwater recharge. These results lay the foundations for the further use of a suite of environmental tracers (in which a primary role is that of water stable isotopes) at the event-scale (i.e., that of rainfall and/or flood) for eventually estimating the effective quota of recharge linked to precipitation and surface water.

中文翻译：

---

表征面向意大利北部亚平宁山脉的冲积扇补给特征的尝试：来自水稳定同位素的指示

如今，气候变化和人类和农业用水需求的增加对意大利北部亚平宁山脉冲积含水层的地下水管理提出了重要问题。大量抽取地下水，加上水质整体恶化，需要详细了解这些含水层的补给机制，这对采取进一步的适应措施很有用。关于冲积含水层（即由砾石材料组成的顶点）的补给区，本研究调查了一个由 282 个水样组成的数据集，其中稳定同位素氧 18 (18O) 和氘 (2H) 可用。后者涉及来自五个选定冲积扇的降水（三个雨量计）、地表水（五个河流）和地下水（二十口井）。该研究证实，可以利用表征该地区雨水和河水的不同同位素特征来初步表征它们对地下水补给的重要性。这些结果为在事件尺度（即降雨和/或洪水的尺度）上进一步使用一套环境示踪剂（其中主要作用是水稳定同位素）奠定了基础，以最终估计有效配额与降水和地表水相关的补给。