Methodology for safety assessment 2015. Updated methodologies from the report v6.0 to v10.0

The methodology book version 10.0 (Suzuki et al., 2016) has been published in June 2016 and is the version used in the Safety assessment 2015. Before the publication of the methodology book version 10.0, we intended to use the methodology book version 6.0 (Suzuki et al., 2015) for the safety assessment 2015 as the final version. However, some important questions regarding the XBeach and SWASH models, overtopping method and hydraulic boundary condition were raised after the publication of the methodology book version 6.0 and further investigation of these issues was decided. In this report, the results of those investigations and necessary changes in the methodology are addressed.