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首页> 外文期刊>Journal of Iberian geology >Hydrogeology and hidrogeochemical modeling in phreatic aquifer of NE Mendoza, Argentina
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Hydrogeology and hidrogeochemical modeling in phreatic aquifer of NE Mendoza, Argentina

机译：阿根廷东北门多萨的潜水含水层的水文地质和水文地球化学模拟

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The objectives of this study are to develop a conceptual hydrogeological model and evaluate groundwater hydrochemical characteristics of the aquifer in the Guanacache Travesía, in the central Monte desert of Mendoza (Argentina). The region has been granted to aboriginal communities for communal use and is experiencing economic development. The area has limited surface water resources and relies on groundwater for economic activities, and in many cases, for human consumption. There are no hydrogeochemical studies on the quality of this water as drinking water or its suitability for agriculture and raising livestock. The present study provides information on water quality and availability in the northeast of Mendoza Province. It includes a detailed review of relevant bibliography, including scattered and unpublished studies with geological and geomorphological data. It also includes water level measurements, a definition of water flow direction and hydrochemical analyses, including some trace elements and isotopic data. The hydrogeological model shows a discharge area characterized by vertical upward flows, evident by thermal waters, lakes, salt deposits and the presence of reduced arsenic in some boreholes. The dominance of fine sediments, low relief, scarce local precipitation, low recharge from precipitation, and low groundwater velocities result in long residence times for groundwater and poor renovation (with remote recharge area). Groundwater has high salt content and hardness, as well as trace elements such as fluoride and arsenic. Localized patches of low salinity waters are found along paleochannels. The isotopic signature of these waters indicates distant precipitation from the mountains, which could also have recharged the aquifer in historic times. In addition to the important geologic controls on surface and groundwater flows, human activities affect local conditions of the aquifer near livestock gathering areas, increasing nitrate concentrations and the proportion of As(III) relative to As(V).
机译：这项研究的目的是建立一个概念性的水文地质模型，并评估门多萨（阿根廷）中部蒙特沙漠中瓜纳卡什特拉维西亚的含水层的地下水水化学特征。该地区已被授予土著社区以供社区使用，并且正在经历经济发展。该地区地表水资源有限，并且依赖地下水从事经济活动，在许多情况下还用于人类消费。没有关于这种饮用水作为饮用水的水质或其对农业和畜牧业的适用性的水文地球化学研究。本研究提供了有关门多萨省东北部水质和可用性的信息。它包括对相关参考书目的详细审查，其中包括有关地质和地貌数据的零星和未发表的研究。它还包括水位测量，水流方向的定义和水化学分析，包括一些痕量元素和同位素数据。水文地质模型显示了一个排放区，其特征是垂直向上流动，明显的有热水，湖泊，盐分沉积以及某些井眼中砷的还原。优良的沉积物，低浮雕，稀少的局部降水，降水补给量低以及地下水流速低的优势，导致地下水的停留时间长且翻新不佳（补给区偏远）。地下水含盐量高，硬度高，并且含有微量元素，例如氟化物和砷。沿古河道发现了低盐度水的局部斑块。这些水的同位素特征表明山上有遥远的降水，这在历史时期也可能为含水层补给水。除了对地表水和地下水流动进行重要的地质控制外，人类活动还会影响牲畜聚集区附近含水层的局部条件，从而增加硝酸盐浓度和As（III）相对于As（V）的比例。

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