Author(s): Toshimitsu Komatsu; Tomonori Saita; Naoko Kohashi
Linked Author(s): Toshimitsu Komatsu
Keywords: Sediment transport; BaNK block; Beach nourishment method; Waveenergy
Abstract: Beach erosion in Japan is becoming more and more of an issue, and countermeasures against this problem must be implemented without delay. In this study, we develop a new and effective method, using blocks called "BaNK" blocks, to control sediment transport in order to deal with this problem. We examine the fundamental properties of this method by conducting laboratory experiments and field tests on the Nogita Coast. We initially investigated the conditions of flow around BaNK blocks installed in an experimental wave field, confirming that this technique allows bottom flow to be effectively controlled and providing a basis for appropriate BaNK block layout. We then installed two block arrangements at separated location on the Nogita Coast and observed sediment transport under these conditions. These field tests confirmed that sediment transport can be controlled in practice through the use of BaNK blocks in the appropriate arrangement. The results of this study indicate the possibility of beach nourishment using BaNK blocks.
Year: 2001