Chambers, J. and Goff, C. and Slater, N. and Meldrum, P. and Wilkinson, P. and Gunn, D. (2021) Long-term monitoring of sub-surface change in earth embankment dams. In: INCOLD 2021 Symposium, 24 - 27 February 2021, New Delhi, India and Online.
Full text not available from this repository.Abstract
Here we describe the development of a novel characterisation and monitoring approach for embankments such as earth dams. The system, called PRIME (Proactive Infrastructure Monitoring and Evaluation), is based on time-lapse electrical resistivity tomography (ERT), which is a geophysical technique used to non-invasively image subsurface resistivity to depths of tens of metres. Resistivity is a useful property because it is sensitive to compositional variations, changes in moisture content, and ground movement. PRIME is a low-cost system designed for remote operation, allowing resistivity images to be captured automatically and streamed via a web interface. It comprises four key elements: (1) low-power field instrumentation; (2) data telemetry and storage; (3) automated data processing; (4) and web dashboard information delivery. These elements form the basis of an asset condition monitoring approach that provides near-real-time spatial information on both subsurface processes and surface responses The use of this approach is illustrated with reference to a series of studies relating to earthwork condition monitoring. These studies demonstrate that PRIME provides a means of spatially tracking complex subsurface moisture driven processes (such as leakage or settlement) that would be very difficult to characterise using other approaches (e.g. surface observations or intrusive sampling).
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Floods > Dams and reservoirs |
| Divisions: | Floods |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 26 Mar 2021 14:15 |
| Last Modified: | 08 Apr 2021 15:06 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1474 |
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