Abstract
Temporal variation of soil properties of the reclaimed dredged soil and sand capping at an artificial intertidal flat has been monitored by means of multi-channel analysis of surface waves (MASW). MASW survey has been conducted using geophones during an exposure period; however, it cannot be continued when the survey array submerges even in the period of ebb-tide because of large consolidation settlement. In the present study, MASW survey using hydrophones is applied to the submerged region to continue monitoring the soil properties. The results obtained by MASW survey using hydrophones are similar to those obtained by MASW survey using geophones; however, there is a tendency that the sand capping is evaluated slightly thinner and the bottom boundary of the very soft soil layer is unclear in the MASW survey with hydrophones, because seismic attenuation in the soft soil layers is significant.
