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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Integrating Hydrogeological and Geophysical Methods for the Characterization of a Deltaic Aquifer System
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Integrating Hydrogeological and Geophysical Methods for the Characterization of a Deltaic Aquifer System

机译：结合水文地质和地球物理方法表征三角洲含水层系统

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Groundwater management needs detailed aquifer characterization, especially in semiarid costal aquifer systems that are under hydrological pressure. Our study area is in the Tordera delta, northeastern coast of Spain, where a detrital fluvio-deltaic aquifer system has been developed above granitic basement. The main purpose of this study is to characterize the complex lithological structure and the seawater intrusion state by combining hydrological information, audiomagnetotelluric (AMT) and seismic reflection and refraction models. This allowed us to provide spatially continuous information about aquifer properties and processes. Thus, we have determined the thickness and continuity of the aquifer units, as well as the morphology and depth to the basement. The models revealed that the main seawater intrusion main path is found in the western deltaic area that coincides with an existing buried paleochannel. This new result explains the anomalously high chlorine concentrations observed in the deep semiconfined aquifer more than 1,500 m inland.
机译：地下水管理需要详细的含水层特征，尤其是在处于水文压力下的半干旱沿海含水层系统中。我们的研究区域位于西班牙东北海岸的Tordera三角洲，在花岗岩基底上方已开发出碎屑性河流-三角洲含水层系统。这项研究的主要目的是通过结合水文信息，声磁大地电磁（AMT）以及地震反射和折射模型来表征复杂的岩性结构和海水入侵状态。这使我们能够提供有关含水层性质和过程的空间连续信息。因此，我们确定了含水层单元的厚度和连续性，以及地下室的形态和深度。这些模型表明，主要的海水入侵主要路径位于西部三角洲地区，与现有的埋藏古河道相吻合。这一新结果解释了在内陆超过1,500 m的深半封闭含水层中异常高的氯浓度。

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