Using the Ground-Penetrating Radar Method in the Studying of Hydrocarbon-Contaminated Soil in Navodari area-Romania

• Autorzy: Sorin Anghel

Identyfikatory

DOI

10.29227/IM-2024-01-52

Warianty tytułu

PL

Wykorzystanie metody radaru penetrującego grunt w badaniu gleby zanieczyszczonej węglowodorami w obszarze Navodari - Rumunia

• Języki publikacji: EN

Abstrakty

EN

Ground penetrating radar (GPR) is a very useful geophysical method for use in hydrogeologic and near-surface mapping studies. It can be used to study contaminants in groundwater, subsurface faulting, and underground cavities (natural or man-made), all of which pose potentially dangerous geological hazards. The GPR technique is similar in principle to seismic reflection and sonar techniques. The propagation of the radar signal depends on the frequency-dependent electrical properties of the ground.Electrical conductivity of the soil or rock materials along the propagation paths introduces significant absorptive losses which limit the depth of penetration into the earth formations and is primarily dependent upon the moisture content and mineralization present.Reflected signals are amplified, and transformed to the audio-frequency range, recorded, processed, and displayed. From the recorded display, subsurface features such as soil/ soil, soil/rock, and unsaturated/saturated interfaces can be identified. In addition, the presence of floating hydrocarbons on the water table, the geometry of contaminant plumes, and the location of buried cables, pipes, drums, and tanks can be detected. The GPR data are presented as a twodimensional depth profile along a scanned traverse line in which the vertical axis is two-way travel time measured in nanoseconds. The location of hydrocarbon contamination in the ground using the GPR method is based mainly on information taken from reflected signals. In the cases investigated in Romania contaminated sites (Navodari area), such signals were very rarely recorded. A long time after spillage, contamination takes the form of plumes with different size and distribution, which depends on the geological and hydraulic properties of the ground. The survey discussed in this paper was carried out using the GPR system-Noggin with two antennas (250 and 500mHz) Data collected were processed using software(EKKO_Project™ GPR Data Analysis) to produce 2D radargram in time scale. The presence of contaminant plumes as well as the water table are observed in the GPR sections at depths approximately of 0.5 to 1.5 m. In the GPR section, the oil contaminated layer exhibits discontinuous, subparallel, and chaotic high amplitude reflection patterns. Promising results were also obtained in the GPR survey where three obvious reflection patterns representing the top sand-silt layer, oil-contaminated zone and, the underlying thick soft clay were detected in all 2D radargrams of the GPR traverse lines.

Słowa kluczowe

EN

pollution; ground penetrating radar; hydrocarbon; soil

PL

zanieczyszczenia; radar penetrujący ziemię; węglowodory; gleba

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2024
• Tom: Vol. 1, no. 1
• Strony: 465--472
• Opis fizyczny: Bibliogr. 7 poz., zdj.

Twórcy

autor

Sorin Anghel

• National Institute for Research and Development on Marine Geology and Geo-ecology- GeoEcoMar 23-25 Dimitrie Onciul Street, RO-024053, Romania

• https://orcid.org/0000-0001-7772-0135

Bibliografia

• 1. G. B. Asquith and C. R. Gibson, Basic well log analysis for geologists (AAPG., 1982), 216 pp.
• 2. A. K. Benson and K. L. Payne, M. A. Stubben, Mapping groundwater contamination using dc resistivity and VLF geophysical methods—a case study. Geophysics 64 (1), 80 – 86 (1997).
• 3. F. L. Brandao, Projeto SINFOR: Mapa geolo´gico da regia˜o metropolitana de Fortaleza. Texto Explicativo. Se´rie Cartas Tema´ticas. 34 pp, (1995).
• 4. D. L. Campbell, J. E. Lucius, K. J. Ellefsen and M. Deszcz-Pan, Monitoring of a controlled LNAPL spill using ground penetrating radar. Proceedings of the Symposium Application of Geophysics to Engineering and Environmental Problems (SAGEEP’96). Keystone, CO, USA, pp. 511 – 517 (1996).
• 5. J. J. Daniels, R. Roberts and M. Vendl, Site studies of ground penetrating radar for monitoring petroleum product contaminants. Proceedings of the symposium application of geophysics to engineering and environmental problems (SAGEEP’96), vol. 2. Oak Brook, IL, USA, pp. 597 – 609 (1992).
• 6. G. R. Olhoeft, Direct detection of hydrocarbon and organic chemicals with ground penetrating radar and complex resistivity. Proc. NWWA/API Conference Petroleum Hydrocarbons and Organic Chemicals in Ground Water – Prevention, Detection and Restoration. National Water Well Association, Dublin, pp. 284 – 305 (1986).
• 7. F. L. Teixeira, W. C. Chew, M. Straka, M. L. Oristaglio and T. Wang, Finite-difference time-domain simulation of ground penetrating radar on dispersive, inhomogeneous, and conductive soils. IEEE Transactions on Geoscience and Remote Sensing 36 (6), 1928 – 1937 (1998).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).