CONSIDARATION OF SEAWALL EFFECT ON TSUNAMI EVACUATION
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- ARIKAWA Taro
- 中央大学 理工学部 都市環境学科
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- NOJI Toru
- 東京都建設局北多摩北部建設事務所
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- HIRANO Hiroaki
- 中央大学 理工学部 都市環境学科
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- ENDO Masato
- 中央大学 理工学部 都市環境学科
Bibliographic Information
- Other Title
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- 防護施設の津波避難に及ぼす影響に関する考察
- ボウゴ シセツ ノ ツナミ ヒナン ニ オヨボス エイキョウ ニ カンスル コウサツ
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Abstract
The purpose of this study is to verify the effect of the seawall height on successful evacuation rates. The relation between the height of seawalls and the mortality was analyzed using the data of past questionnaires. Furthermore, numerical tsunami and evacuation simulations were performed for two towns to verify the effect of different seawall heights on morality. Under Tohoku tsunami conditions, the results indicate that early evacuation is more effective in decreasing mortality rates than constructing higher seawalls. The numerical results show that the inundation area decreases by 5% and the mortality decreases by 10 to 20% when the seawall height increased. On the other hand, the mortality rate was reduced to zero when the start time to evacuation is within 10 min.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72 (2), I_1561-I_1566, 2016
Japan Society of Civil Engineers
