Presented at the third general assembly meeting of the International Tsunami Disaster Prevention Society held in Tokyo on Nov. 6, 2019. Abstract is as follows: The objective of the Tsunami Disaster Prevention Measures Session (TDPMS), newly established in October 2019 in the International Tsunami Disaster Prevention Society (ITDPS), is to prepare, by multi-disciplinary approach, publishing the GUIDELINE for planning a tsunami disaster prevention measures. This GUIDELINE based on the systematic descriptions on the hazard reduction measures and technics against the tsunami hazards, shall support the different local government and citizens living in different kinds of natural and social conditions, to make a tsunami disaster prevention and reduction plan designed appropriately for each of their local areas. In coming 2 years, the session will establish “the systematic description on the hazard reduction measures and technics against the tsunami hazards”, build up “the contents of the GUIDELINE for planning a tsunami disaster prevention measures”, investigate “the implementation plan of the GUIDELINE”, and get “the fund money necessary for publishing the GUIDELINE”. During these activities, this session also will clarify the features of the tsunami hazards and examine the differences among the official laws relating to disaster preventions and the documents already provided by various kinds of organizations including academic societies, civilian forums, and others. The final goal of this session is publishing the unprecedented GUIDELINE which only ITDPS can.
6. 巨大防潮堤建設計画を知って
個人的に抱いた疑問・危惧
The giant seawall was the best answer?
巨大防潮堤でも津波の被害は防げないのに、
生態系破壊などの懸念があるのに、
なぜ、巨大防潮堤建設計画が進められたのか?
なぜ、他の選択肢が棄却されたのか?
対象地域の住民はどのように考えるのか?
行政に理解のある学識経験者の援護による
同意の強要めいたものがあるのでは?
復興事業計画は長期的な視点の下で
2017.8.26 策定されたのか?6
13. 津波防災対策体系化の背景 (Background)
東日本大震災時及び後の課題 (Problems at and after the
Great East Japan Earthquake)
① 岩⼿県宮古市⽥⽼の被害 (高さ10mの2重防潮堤の過
信、多数の津波警報装置の故障)
② 大川小学校の被害 (津波避難の失敗、災害風化)
③ 釜石の奇跡 (災害風化の防止、津波避難の成功)
④ 南三陸町⼾倉小学校の津波避難 (校⻑の判断による災
害防止)
⑤ 東松島市でのイマ―ションスーツ活⽤(溺⽔防止)
⑥ 津波想定高さの大幅アップ
5.津波防災対策体系化の全体構想(試案)
Systemization of Tsunami Disaster Prevention Measures
14. 津波防災対策体系化の⼿法 (Way for Systemization)
⼀つの対策で完全な津波対策を⾏うことは不可能なので、今までバラ
バラに⾏われていた⾊々な対策を先ず拾い上げて⾒える化(図⽰;
Visual control of measures)を⾏う。 考え方のベース(Basis)
は本質安全(Inherent Safety)と多重化(Multiple Protection
Layer)で、下図が叩き台。
図1 多重化した
津波対策体制