Reclamation analysis to evaluate measures to increase an acceptable capacity of dredged clay disposal pond

Abstract

Shipping plays an important role in Japan surrounded by the sea and navigation channel must be dredged to accommodate the increasing size of vessels. Most of the dredged soil is usually discharged into a disposal pond. Since it is not easy to secure a new disposal pond, it is necessary to make effective use of the pond currently in use. Therefore, measures to accurately predict the amount of consolidation settlement of dredged soil discharged into the disposal pond are being studied. In this paper, regarding the Shinmoji-Oki disposal pond (S-3 area), which currently accepts dredged soil from the Kanmon waterway, we reported the way to discharge the dredged soil to the pond and the annual accumulated soil volume in it. Then, through the distribution chart of mud surface elevation in S-3 area and elapsed time, we clarified the effects of different way to discharge the dredged soil. Furthermore, to accurately estimate the future acceptable capacity of the pond, the prediction model identified by back analysis is also proposed.