Print Email Facebook Twitter The application of a tandem dike system in Vietnam Title The application of a tandem dike system in Vietnam Author Tri, M.C. Cong, M.V. Verhagen, H.J. Nghia, N.K. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2012-10-10 Abstract In the low-lying coastal regions coastal defense structures are usually designed with a main function to protect the hinterland from highly vulnerable of sea flooding. Sea dikes are usually the most common and important elements which form the coastal flood defense system. Sea dikes are designed at a pre-defined circumstance and requirement. For instance, dikes are designed where no overtopping, some overtopping or large overtopping water is allowed. The most interesting issues at the preliminary design stages of a sea dike are its height, layout and associated overtopping discharge criteria. There have been many discussions on whether sea dikes should be designed high enough to not allow any overtopping water or using relatively low but “strong” dikes in order to allow from some to large overtopping water. Recently, the ComCoast1 project develops and demonstrates innovative solutions for flood protection in coastal areas. In which different types of dike cross section and layouts of defensive system were proposed. Concepts of defensive zones are presented beside the already existing concept of defensive lines. However, within the ComCoast project, attentions are paid mainly to developments of the innovated concepts rather than focusing on comparison of the proposed system with the conventional sea defenses. Thus, there is still lack of guidance and comparative tools to determine the best choice amongst the conventional or innovated options in decision making process. This study focuses on development of the comparative framework and generic guidance to support the decision making process in selection of the best suitable layout option of the sea dike system for a given location. Based on overtopping criteria two situations are considered for the analysis: (i) using one defensive line; (ii) using two defensive lines (defense zone). The multi-criteria analysis (which takes social, economic, environment and technical aspects into account) and the cost-benefit analysis are used in the selection of the best option. Finally application is made for several case studies of coastal flood defense in Vietnam. Subject sea diketandem dikeflood defense system To reference this document use: http://resolver.tudelft.nl/uuid:707054e4-b314-49e1-bfd8-abe7d4a067cb Publisher Water Resources University Source ICEC 2012: 4th International Conference on Estuaries and Coasts, Hanoi, Vietnam, 8-11 October 2012 Part of collection Institutional Repository Document type conference paper Rights (c) 2012 The Author(s) Files PDF E20_Tri.pdf 238.94 KB Close viewer /islandora/object/uuid:707054e4-b314-49e1-bfd8-abe7d4a067cb/datastream/OBJ/view