Investigating epikarst using low-frequency GPR: example from the Gran Sasso range (Central Italy)
Investigating epikarst using low-frequency GPR: example from the Gran Sasso range (Central Italy)
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DOI：
10.1007/s10064-005-0017-y
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发表时间：
2006-01
影响因子：
4.2
通讯作者：
M. Tallini;Diego Gasbarri;D. Ranalli;M. Scozzafava
中科院分区：
文献类型：
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作者：
M. Tallini;Diego Gasbarri;D. Ranalli;M. Scozzafava
表层岩溶的真实三维视图是理解岩溶地下水现象的关键。地质雷达被证明是非常有效的调查表层岩溶的一个天坑位于大萨索岩溶范围（意大利中部）。使用了两种不同的低频天线（100 MHz双基地屏蔽和40 MHz双基地非屏蔽）。雷达信号解释与表层岩溶和钻孔数据的现场观测。识别出两个雷达异常面，它们与表层岩溶面的顶部和底部相关。这两个表面的形状与研究天坑的表面地形及其主要节理和岩溶的方向相关。这项工作表明，这种三维重建可以有效地应用于岩溶含水层脆弱性研究。
A realistic 3D view of the epikarst is key to understanding karst groundwater phenomena. Ground penetrating radar proved to be highly effective for investigating the epikarst of a sinkhole located in the Gran Sasso karst range (central Italy). Two different low-frequency antennae (100 MHz bistatic shielded and 40 MHz bistatic unshielded) were used. The radar signal interpretation was correlated with field observations of the epikarst and borehole data. Two radar anomaly surfaces were identified, which were correlated with the top and bottom of the epikarst surface. The shape of the two surfaces correlates well with the surface topography of the study sinkhole and with the orientation of its main joints and karren. The work indicated that such a 3D reconstruction could be usefully applied to karst aquifer vulnerability studies.