Abstract
The method to easily measure the elastic wave velocity distribution of the irrigation tank was proposed, in which compaction rammer as a seismic source and two geophones as a receiver were used. Combining the above obtained velocity distribution with the results of electric, electromagnetic wave and elastic wave explorations, the self-organization-maps was constructed to investigate the inner condition of embankment. As a result of application to the actual embankments, it became clear that the location having the different categories in a small area was possibly coincident with the leakage area. By using the useful information to infer the inner situation of the embankment obtained from the proposed method, the effective countermeasure to maintain the embankment could be proposed from the discussion with the admin-istrators. The proposed in-situ investigation method took a few hours in a single measurement, and thus a few embankments could be diagnosed in a day.
