Delineation of macroporous zones in the unsaturated portion of the Miami Limestone using ground penetrating radar, Miami Dade County, Florida

Mount, G.; Comas, Xavier; Wright, William; McClellan, M.

doi:10.1016/j.jhydrol.2015.05.053

Cited by 10 publications

(5 citation statements)

References 38 publications

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“…Dewow filter: To eliminate the elements of DC signal, also referred to as DC bias, and significantly low-frequency signal trend in the data, which was also known as a ‘wow’ effect. 24…”

Section: Methodsmentioning

confidence: 99%

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The Assessment of Relative Permittivity on Diesel Vapour in the Moisture Content of Terap Red Soil by Ground Penetrating Radar

Ghazali

Zainon

Idris

et al. 2020

Air, Soil and Water Research

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In a common agriculture resource, soil contamination monitoring is a prominent area of study. Nowadays, it is crucial to provide a database for the interpretation of ground penetrating radar (GPR) field data in monitoring soil contamination, such as diesel scatter migration. This study aims to assess the association between permittivity properties and soil water content (θw) for diesel contamination in Terap Red soil, which is classified as lateritic soil. Terap Red soil is an agro potential soil and available in more than 40% of distribution areas in Northern Malaysia (Agro-based State). In this research, 800 MHz shielded antenna GPR was applied for 24 hour measurement in a concrete simulation field tank, which was filled with Terap Red soil (1.5 m x 2.6 m x 1.5 m) located at Universiti Teknologi MARA (UiTM) Perlis, Malaysia. Embedded moisture content probe was simultaneously measured to monitor the response of volumetric water content in the contaminated soil. The GPR data were pre-processed and filtered by Reflexw 7.5. The calibrated Agilent Technologies Automated Vector Analyser (VNA) was used to verify the independent relative permittivity value from GPR. As a result, the evaluation of velocities and reflection of GPR data were influenced by the presence of diesel and contaminated vapour. A positive and significant correlation was obtained between relative permittivity and moisture content in the diesel-contaminated soil. In addition, a positive and strong linear regression analysis was also found between relative permittivity and moisture content. This analysis included an accurate total difference of root mean square error (RMSE) difference, which amounted to 0.04, with calibrated dielectric permittivity.

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“…Dewow filter: To eliminate the elements of DC signal, also referred to as DC bias, and significantly low-frequency signal trend in the data, which was also known as a ‘wow’ effect. 24…”

Section: Methodsmentioning

confidence: 99%

“…•• Background removal: To eliminate the background noise occurring in a horizontal position during the phenomenon of antenna ringing in the GPR data. • • Dewow filter: To eliminate the elements of DC signal, also referred to as DC bias, and significantly low-frequency signal trend in the data, which was also known as a 'wow' effect 24. …”

mentioning

confidence: 99%

The Assessment of Relative Permittivity on Diesel Vapour in the Moisture Content of Terap Red Soil by Ground Penetrating Radar

Ghazali

Zainon

Idris

et al. 2020

Air, Soil and Water Research

View full text Add to dashboard Cite

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“…Thus, from data processing, we calculated the EM wave propagation velocity of different soil layers. Values of time and distance between antennas were used to generate a linear regression and calculate wave propagation velocities using the inverse of the slope (Daniels, 2004;Mount et al, 2015). The dielectric permittivity of the different materials was calculated using v = 0.3/√ɛr (Daniels, 2004;Mount et al, 2015;Tran et al, 2015), where v is the velocity of wave propagation, 0.3 is a constant, and ɛr is the relative dielectric permittivity.…”

Section: Methodsmentioning

confidence: 99%

Use of Ground Penetrating Radar to Study Spatial Variability and Soil Stratigraphy

Campos

Vidal‐Torrado²,

Modolo

2019

Eng. Agríc.

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Ground Penetrating Radar (GPR) is a geophysical method that uses electromagnetic waves to study subsurface structure in different fields such as geology, agriculture and civil engineering. The wave penetration in the soil is strongly controlled by the electrical conductivity of soil components such as clay, organic matter, and water. In this study, tests were conducted in a floodplain in the Elizabeth Creek watershed (New Jersey-USA). We established one transect where measurements were completed using two techniques, common mid point (CMP) and constant offset profile (COP), both with 100-MHz frequency antennas. Measurements were also completed using 250 and 500 MHz shielded antennas. GPR showed good accuracy to study soil spatial variability and stratigraphy. Antennas of a higher frequency had less vertical investigation capacity and greater accuracy. In this study, it was not possible to clearly differentiate signals from organic matter and clay; this was the main limitation of the GPR system.

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“…The method has proven especially useful to determine the limits between unsaturated 25 and saturated zone, image the water table in karst systems, and define the fresh-saltwater boundaries in coastal aquifers (e.g. Gustafsson, 2005;Igel et al, 2013;Kruse et al, 2000;Mount et al, 2015;Paz et al, 2017). An electromagnetic impulse of a distinct frequency f is sent via a transmitter antenna into the ground, the ground response waves are recorded by a receiver antenna mounted usually close to the sender (so called vertical incidence case, Figure 4d).…”

Section: Ground Penetrating Radarmentioning

confidence: 99%

Dynamics of hydrological and geomorphological processes in evaporite karst at the eastern Dead Sea – a multidisciplinary study

Al-Halbouni¹,

Watson²,

Holohan³

et al. 2021

Preprint

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Abstract. Karst groundwater systems are characterised by the presence of multiple porosity types. Of these, subsurface conduits that facilitate concentrated, heterogeneous flow are challenging to resolve geologically and geophysically. This is especially the case in evaporite karst systems, such as those present on the shores of the Dead Sea, where rapid geomorphological changes are linked to a fall in base level by over 35 m since 1967. Here we combine field observations, remote sensing analysis, and multiple geophysical surveying methods (shear wave reflection seismics, electrical resistivity tomography [ERT], self-potential [SP] and ground penetrating radar [GPR]) to investigate the nature of subsurface groundwater flow and its interaction with hypersaline Dead Sea water on the rapidly retreating eastern shoreline, near Ghor Al-Haditha in Jordan. Remote-sensing data highlight links between the evolution of surface stream channels fed by groundwater springs and the development of surface subsidence patterns over a 25-year period. ERT and SP data from the head of one groundwater-fed channel adjacent the former lakeshore show anomalies that point to concentrated, multidirectional water flow in conduits located in the shallow subsurface (

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Delineation of macroporous zones in the unsaturated portion of the Miami Limestone using ground penetrating radar, Miami Dade County, Florida

Cited by 10 publications

References 38 publications

The Assessment of Relative Permittivity on Diesel Vapour in the Moisture Content of Terap Red Soil by Ground Penetrating Radar

The Assessment of Relative Permittivity on Diesel Vapour in the Moisture Content of Terap Red Soil by Ground Penetrating Radar

Use of Ground Penetrating Radar to Study Spatial Variability and Soil Stratigraphy

Dynamics of hydrological and geomorphological processes in evaporite karst at the eastern Dead Sea – a multidisciplinary study

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