Integrated Ground Penetrating Radar and Electrical Resistivity Study to Explore Such Basrah Low Resistivity Soils for Engineering Purposes, Southern Iraq

Authors

  • Emad H. Al-Khersan Department of Oil and Gas Engineering, Basrah University for Oil and Gas, Basrah, Iraq
  • Basim R. Hijab Department of Geology, College of Science, University of Baghdad, Iraq
  • Israa A. Al-Khazali Department of Subsurface Geology, New Well Delivery, Basrah Oil Company, Rumaila, Basrah, Iraq

DOI:

https://doi.org/10.46717/igj.54.2E.7Ms-2021-11-23

Keywords:

Objects, Basrah, Trenches, Utilities, Soil

Abstract

A total of 45 ground penetrating radar profiles have been conducted in Basrah City, Southern Iraq, to detect buried utilities in such soils which have not been tested before. This study tries to explore how much this technique can be useful for Basrah low resistivity soils during arid and humid seasons. In Basrah University Campus (silty clay soil) and Basrah Sport City (silty sand soil), 37 and 8 ground penetrating radar profiles were achieved inside these locations respectively. Vertical electrical sounding (Schlumberger array) and electrical profiling (Wenner array) were also used in compatibility with radar surveys side by side in all sites. Here, radargrams do not reveal much more details about the subsurface conditions because of the moisture content and soil characterizations. The actual penetrating depth of 250 and 500 MHz antennas are limited to 1.4 and 0.4 m respectively due to the soil total dissolved solids of about 6790 ppm. The tests suggest that the 250 MHz antenna is somewhat better than the 500 MHz one for detecting the shapes and depths of the buried bodies in silty clay soils during rainy or even arid periods. In Basrah Sport City (500 MHz) antenna, the radargram wave signals are not good for more than 2.5 m depth, and this antenna, rather than the 250 MHZ one is suitable for silty sand soil type.

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Published

2021-11-26