TY - JOUR AU - Matsutomi, Hideo PY - 2020/12/31 Y2 - 2024/03/28 TI - EFFECT OF THE DENSITY OF INUNDATION WATER ON TSUNAMI RUN-UP JF - Coastal Engineering Proceedings JA - Int. Conf. Coastal. Eng. VL - IS - 36v SE - Full Length Papers DO - 10.9753/icce.v36v.papers.62 UR - https://icce-ojs-tamu.tdl.org/icce/article/view/10332 SP - papers.62 AB - Aiming for the advancement of historical and/or prospective tsunami scale evaluations, and focusing on the tsunami run-up, series solutions to the tip position a(t), velocity U (=da/dt) and acceleration d2a/dt2 in the tip region of inundation flow (unsteady flow) with sediment over a uniformly sloping bottom under the condition that the friction factor K is not linked to the density of inundation water, and analytical solutions to a(t), U(t), d2a/dt2, the maximum run-up distance a_m and height Rm under the condition that K is linked to density are derived, and effects of density on them and run-up process are theoretically examined. It is indicated that (1) in the run-up analysis (including numerical simulation) of tsunami with sediment under the condition of a constant K, even if a_m and Rm can be predicted accurately, there is a possibility of evaluating the run-up duration time inaccurately and vice versa, and (2) linking K to density is necessary to solve this matter. An expression for the relationship between K and is also presented. Moreover, it is verified that the derived series and analytical solutions are useful to discuss the effects of density on the run-up of tsunami with sediment through a comparison between the experimental and theoretical maximum run-up distances. ER -