8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

1/23

Lessons and recovery process from the2011 East Japan tsunami- Intro. of IRIDeS

By Fumihiko Imamura, ProfDirector, Prof.,IRIDeS, Tohoku University

INTERNATIONAL SEMINAR ON THE 10 YEARS COMMEMORATIONOF THE 2004 INDIAN OCEAN TSUNAMI

Towards a Resilient Maritime Nation to Natural Disastersfor Ensuring Sustainable Marine Investment and Development

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

2/23

Satake, 2010

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

3/23

Historical data of earthquake & tsunami in Tohoku

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

4/23

Example of old documentSandai Jitsuroku ( )

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

5/23

Historical tsunamis in Tohoku for 400 years and the 2011 Tohoku Eq.

T.Hatori Distributions of Seismic Intensity and Tsunami of the 1793 Miyagi Oki Earthquake, NortheasternJapan, Bulletin of Earthquake Research Institute, University of Tokyo, 62, 297-309 (1987).

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

6/23

The inundation area far exceeded that indicated inmunicipal hazard maps.

Ofunato City, IwatePref.

Sendai City, Miyagi Pref.

Inundated Area Hazard Maps

Source: Cabinet Office

Disaster Prevention

Disaster Management BureauCabinet office(2011)

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

7/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

8/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

9/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

10/23

Levee heights andTsunami trace heights

[Basic concept of levee design height ]Height of levee is decided by the higher

of either storm surge or tsunami.Tsunami height is mainly used for

sawtooth coasts and storm surge height isused for others.

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

11/23

The tsunami attacking Sendai area 16:01 JT on March 11

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

12/23

Tsunami Disasters

Huge amount of inundation (561 km2)+ destructive wave force Direct and in-direct tsunami damages Floating of debris, ships, cars and tanks Fires by attack of ships, sea water, houses Change of topography and Geometry due to erosion and

deposition

Ships and fire at Kesennuma Destruction on community at Sendai

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

13/23

Past Protections in Multi-layers, Damage by the 2011 and Plan forTsunami Resilient city in Sendai

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

14/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

15/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

16/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

17/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

18/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

19/23

Disaster Disaster Institute settled inMajor National University

1923Great Kanto

Earthquake

The University of TokyoEarthquake Research

Institute 1925-1950Typhoon Jane

Kyoto UniversityDisaster Prevention Research

Institute 1951-2011GEJE and Tsunami

Tohoku University InternationalResearch Institute of

Disaster Science 2012-

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

20/23

Research area Tohoku Univ.IRIDeS

Univ. ofTokyo

E Institute Kyoto Univ.D Institute

Niigata Univ.R Institute

FukushimaUniv.

S Institute D Institute

Hazardand Risk

Evaluation

DisasterScience

Earthquake,Tsunami

Hazard and Risk

Natural DisasterScience

4 4

3

Volcanic

Wind and Rain

Snow Storm

Human & Social ResponseHuman and

SocialResponse

11

Regional

& UrbanReconst-ruction

Regional safety

Regional andUrban

ReconstructionRadiationDecontamination

Robotics

Medical Relief Disaster MedicalScience

Public Cooperation Information

management

11

International Collaboration Yes Yes Yes

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

21/23

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

22/23

DisasterCycle

8/10/2019 Lesson and Recovery Process From the 2011 East Japan Tsunami

23/23

Thank you for your attention