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| | Abstract | | Integrated geophysical surveying was conducted on a levee system part of which was to be excavated for the repair of an existing deteriorated sluice. S-wave and resistivity tomography surveys across the levee body were applied as well as the conventional integrated geophysical surveying. Tomography sections clearly delineated stacked structure in the levee body. CPTs were also conducted before the excavation. After the excavation, surface resistivity mapping and short-spacing surface wave survey were carried out so as to obtain ground truthing data. The stacked structure and its geophysical correspondence in the levee body were directly identified by the measurements. The comparative measurements before and after the excavation showed the usefulness of tomographic method as ground truthing tool. CPT and SCPT were also helpful to acquire detailed ground truth data in levee systems. |
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