| We conducted the evaluation for perched water level at a landslide site of road banking by electric measurement. Underground water level have a huge impact on stability of slope at a banking structure, so it is important to understand the distribution of underground water to keep safety of road banking structures. Monitoring water levels by observation wells is effectively and simple, but these results obtained from observation wells are only point information, it is not enough to understand a distribution of underground water of large area. So, we considered possibility for applying electric measurement to observe a water table at slope at road banking structure. We made banking model that have controlled perched water in inside, and calculated resistivity by electric method. We deployed plural measurement lines on a banking to grasp 3D structure of water table, and made 3D image of water table. On this presentation, we show the results, resistivity model of electrics measurement, including 3D image of water level, and study for possibility of imaging of perched water level by electric measurement. |
