Abstract
The incessant expansion of megacities is usually associated with the extension of different underground utilities underneath these cities. In recent years, the need for a swift, precise, cost-effective, and environmentally benign tool to map these utilities in such a harsh urban environment is becoming a necessity. In coastal cities, such as Jeddah City in Saudi Arabia, cultural noise, the shallow water table, and the conductive nature of soil form additional obstacles to a successful mapping of underground utilities. This study presents the experience of applying a combined electromagnetic induction and ground penetrating radar surveys over a test site in Jeddah City in order to assess the capability of the suggested combination to map different kinds of underground utilities in such an environment. The results show that the suggested combination can be an efficient tool to map different underground utilities buried within conductive soil, and it provides valuable information about objects' depth, shape, and dimensions.