Potential Application of Geosynthetics for Reconstruction Following Coastal Land Subsidence Induced by the Great East Japan Earthquake

Abstract

We explored the potential of employing geosynthetics for the restoration of the coastal area in Tohoku where tectonic movement during the 2011.3.11 Great East Japan Earthquake caused large land subsidence. Based on the preliminary investigation, we have found that: i) The flexible structures reinforced with geosynthetics are available not only for urgent remediation but also as permanent countermeasures against inundation increased by climate change-induced storm surges. ii) The long-term monitoring of ground surface movement and sea-level rise is essential for determining what kinds of adaptive measure is most suitable at the objective site and when they should be taken in order to avoid inundation.