Proposal and application of new numerical model for disaster mitigation and protection in gravel beach

2017 Fiscal Year Final Research Report

• Project/Area Number: 26709035
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Gifu National College of Technology (2015-2017); Nagoya University (2014)
• Principal Investigator: KIKU Masami 岐阜工業高等専門学校, その他部局等, 講師 (50714127)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 水理模型実験 / 数値波動水槽 / 越波 / 礫浜 / UAV-SfM/MVS測量 / 礫粒径 / BASEGRAIN

Outline of Final Research Achievements

In this study, hydraulic model experiments, numerical simulations and field observations were carried out for disaster mitigation and protection in gravel beaches. From experimental results using a two-dimensional wind-wave flume, it was found that wind effects on wave overtopping around vertical seawalls increased under low wave overtopping rate conditions. This suggested that it is important to consider the wind effects in designing vertical seawalls. It was revealed that the three-dimensional numerical wave flume including wind external force can compute wave overtopping rates. Wave-dissipation blocks accelerated deposition of gravel. From the field observations in the Shichiri-mihama coast, it was found that high waves propagating from south caused large topographic change. Moreover, image analysis results indicated the characteristics of the spatial-temporal distribution of the medium grain size in the Shichiri-mihama coast.

Free Research Field

海岸工学