Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIII
Written by Sorin ANGHEL
The detection and spatiotemporal monitoring of hydrocarbon contamination in the geological environment (soil, geological formations, and groundwater) represent the main objective of the study, conducted during the period of 2023-2024. The study focused on areas adjacent to the Petromidia refinery with industrial activity exceeding five decades, located in the vicinity of the city of Navodari. Both 'classic' geophysical techniques (VES - Vertical Electrical Sounding, IP - Induced Polarization) and recently introduced techniques on a global scale (GPR - Ground Penetrating Radar) were employed. Electrical and electromagnetic measurements were complemented by magnetic investigations, drilling works, and geological and hydrogeological observations. The most effective geophysical measurements, both for detecting and monitoring underground hydrocarbon contamination, were the geoelectrical resistivity ones, due to the significant contrast in electrical resistivity between the highly resistive pollutant substances and the affected geological environment, consisting of rocks and fluids with much higher electrical conductivity. The geological and hydrogeological data from shallow boreholes were used for the correct interpretation of geophysical anomalies, while the results of magnetic measurements indicated the routes of buried pipelines, and potential sources of pollution.
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