Abstract This paper deals with the application of the Ground Penetrating Radar (GPR) method and the analysis of attributes of the GPR data to characterize and interpret a fluvial-aeolian interaction field located in the Guandacol Valley, northwest Argentina. Several profiles over dunes, interdunes, aeolian mesoforms, and fluvial channels have been acquired. Each data section is analyzed by using standard images of the amplitude of the electric field, as well as representations of different attributes of the reflections such as contrast, dip, curvature, parallelism, and RMS frequency. The analysis of attributes improves the interpretation of the subsurface, by quantifying and making evident properties of the reflection patterns that characterize the sedimentary units. The information obtained using the GPR profiles allows defining seven radar packages, which are useful for reconstructing the internal structure of the fluvial-aeolian succession. Packages 1, 2 and 3 illustrate the stratification of different types of low-sinuosity and high-sinuosity aeolian dunes, as well as aeolian mesoforms. Package 4 corresponds to horizontal or low-angle inclined reflectors obtained in both sandy interdunes and upper parts of several aeolian dunes. A muddy bed that covers most of the area (package 5) probably indicates a period of climate amelioration linked to a high level of the water table. The fluvial component of the fluvial-aeolian succession exhibits two different packages; package 6 represents the infill of partially incised fluvial channels with frequent incisions (concave-up bounding surfaces) and bars (convex-up surfaces). Package 7 is composed of the stacking of parallel to subparallel horizontal reflectors, without concave-up surfaces that indicate deep channels. Finally, we propose a conceptual model that relates the principal radar packages with the temporal evolution of the fluvial-aeolian interaction field of Guandacol Valley.

中文翻译：

---

使用探地雷达和属性分析识别河流-风沙相互作用环境中的沉积单元：阿根廷西北部的 Guandacol 山谷

摘要 本文讨论了探地雷达 (GPR) 方法的应用和 GPR 数据的属性分析，以表征和解释位于阿根廷西北部 Guandacol 河谷的河流-风尘相互作用场。已经获得了沙丘、沙丘间、风成中型态和河流通道的几个剖面图。通过使用电场幅度的标准图像以及反射的不同属性（例如对比度、倾角、曲率、平行度和 RMS 频率）的表示来分析每个数据部分。通过量化表征沉积单元的反射模式的明显特性，属性分析改进了对地下的解释。使用 GPR 剖面获得的信息允许定义七个雷达包，这对于重建河流-风成序列的内部结构非常有用。包 1、2 和 3 说明了不同类型的低曲率和高曲率风成沙丘以及风积中型形式的分层。包 4 对应于在沙丘间和几个风成沙丘的上部获得的水平或小角度倾斜反射器。覆盖大部分区域的泥床（包 5）可能表明与高地下水位相关的气候改善时期。河流-风成演替的河流部分表现出两种不同的组合；包 6 表示部分切开的河流通道的填充物，带有频繁的切口（上凹的边界表面）和条形（上凸的表面）。封装 7 由平行到次平行的水平反射器的堆叠组成，没有指示深通道的上凹表面。最后，我们提出了一个概念模型，该模型将主要雷达包与关达科尔河谷的河流-风沙相互作用场的时间演变联系起来。