NUMERICAL CALCULATION OF THE SEDIMENT TRANSPORTS ALONG THE LAGOONAL COAST ON MAJURO ATOLL

Atoll islands are low-lying and consist of the biological organisms such as corals and foraminifers. These islands have high vulnerability to the coastal erosion and need the conservation plan. Sato and Yokoki (2008) developed the sediment transport model in Majuro atoll. Although they had a good agreement with realistic sediment volume change, the extreme large accretion and erosion were also calculated at some points. Toward accurate estimation of future land changes, we improved the model by considering the interaction between waves and land changes in this study. The calculated results showed no extreme accretion and erosion and better agreement with the realistic sediment volume during 10 years. The present model enabled reasonable estimation for the future land change in Majuro atoll.