Combined interpretation of geophysical, hydrogeochemical and environmental isotope data in a distal lobe of the Maros fluvial fan, Hungary – A novel approach in aquifer characterisation

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies Pub Date : 2024-10-01 DOI:10.1016/j.ejrh.2024.101978

Teodóra Szőcs , Ágnes Rotár Szalkai , Levente Magyar , László Palcsu , Márton Bujdosó , János Stickel , Zoltán Püspöki

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引用次数: 0

Abstract

Study region

Pannonian Basin, Hungary, Maros fluvial fan.

Study focus

This paper presents a novel approach to characterise a distal lobe of a fluvial fan, demonstrating how a combined interpretation of high-resolution geophysical methods like electrical resistivity tomography and geophysical cone penetration tests together with log-correlation, hydrogeochemical, isotope and noble gas data provides a sound basis for aquifer characterisation. This multidisciplinary investigative approach is applicable to any fluvial fan to support water management.

New hydrological insights for the region

(1) The studied fluvial fan forms a hydraulically interconnected aquifer system, with three channel belts and six hydrostratigraphic units. (2) Mean groundwater residence times are distinct in the aquifers studied. Holocene infiltration, with apparent residence time younger than 20–22 years is characteristic in the uppermost channel belt and forms part of local groundwater flow systems. The deeper aquifers host groundwater infiltrated during the Pleistocene, as part of the intermediate flow system. (3) Where the silty-clayey floodplain sediments have been replaced by sandy deposits, and groundwater abstraction is present, groundwater can communicate between the upper and lower channel belts, therefore fresh infiltration passes into the deeper channel belts, resulting mostly in mean residence times younger than 100 years. However, Pleistocene infiltration was detected at about 30 m below surface in the second channel belt, where the unconfined aquifer is missing and silty-clayey sediments are on the surface.

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匈牙利马罗什河流冲积扇远端叶地球物理、水文地球化学和环境同位素数据的综合解释--含水层特征描述的新方法

研究区域匈牙利潘诺尼亚盆地，马罗河流扇。研究重点本文介绍了一种描述河漫滩远端叶片特征的新方法，展示了如何将高分辨率地球物理方法（如电阻率层析成像法和地球物理锥入度测试）与测井相关性、水文地球化学、同位素和惰性气体数据相结合，为含水层特征描述奠定坚实基础。这种多学科调查方法适用于任何河漫滩，可为水资源管理提供支持。对该地区的新水文见解 (1) 所研究的河漫滩形成了一个水力互联的含水层系统，有三个河道带和六个水文地层单元。(2）在所研究的含水层中，地下水的平均停留时间各不相同。最上层河道带以全新世渗透为特征，表观停留时间小于 20-22 年，是当地地下水流系统的一部分。较深的含水层中的地下水是在更新世期间渗入的，是中间水流系统的一部分。(3) 在淤泥质粘土洪泛区沉积物已被砂质沉积物所取代，且存在地下水抽取的地方，地下水可以在上下河道带之间进行交流，因此，新渗透的地下水会进入较深的河道带，导致平均停留时间大多小于 100 年。不过，在第二河道带地表以下约 30 米处检测到了更新世时期的渗透，该处无承压含水层消失，地表为淤泥质粘土沉积物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)

CiteScore

6.70

自引率

8.50%

发文量

284

审稿时长

60 days

期刊介绍： Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.