Abstract
This study investigates the morphology changes of Gamo Lagoon, located in Sendai City, due to the Great East Japan Tsunami in 2011 and its recovery process. Frequenly captured aerial photograph are effectively utilized to analyze detailed morphological change in response to wave action after the tsunami. The lagoon area was greatly changed due to the 2011 tsunami. The gradual process of river mouth changes and reformation of the lagoon was observed using aerial photographs. As compared with the shoreline position before the tsunami, retreat of the shoreline 40m can be confirmed even now after three years. Meanwhile, the water area shows distinct reduction by 40% as compared with the pre-tsunami situation. Further investigation is highly required to understand future state of the coastal environment destroyed by the deverstating tsunami waves.
