Future Tsunami Disaster Mitigation—Lessons Learnt from the Great East Japan Earthquake and Tsunami Disaster

Author(s):  
Shigeo Takahashi ◽  
Takashi Tomita ◽  
Ken-ichiro Shimosako
Author(s):  
Shunichi Koshimura ◽  
Nobuo Shuto

We revisited the lessons of the 2011 Great East Japan Earthquake Tsunami disaster specifically on the response and impact, and discussed the paradigm shift of Japan's tsunami disaster management policies and the perspectives for reconstruction. Revisiting the modern histories of Tohoku tsunami disasters and pre-2011 tsunami countermeasures, we clarified how Japan's coastal communities have prepared for tsunamis. The discussion mainly focuses on structural measures such as seawalls and breakwaters and non-structural measures of hazard map and evacuation. The responses to the 2011 event are discussed specifically on the tsunami warning system and efforts to identify the tsunami impacts. The nation-wide post-tsunami survey results shed light on the mechanisms of structural destruction, tsunami loads and structural vulnerability to inform structural rehabilitation measures and land-use planning. Remarkable paradigm shifts in designing coastal protection and disaster mitigation measures were introduced, leading with a new concept of potential tsunami levels: Prevention (Level 1) and Mitigation (Level 2) levels according to the level of ‘protection’. The seawall is designed with reference to Level 1 tsunami scenario, while comprehensive disaster management measures should refer to Level 2 tsunami for protection of human lives and reducing potential losses and damage. Throughout the case study in Sendai city, the proposed reconstruction plan was evaluated from the tsunami engineering point of view to discuss how the post 2011 paradigm was implemented in coastal communities for future disaster mitigation. The analysis revealed that Sendai city's multiple protection measures for Level 2 tsunami will contribute to a substantial reduction of the tsunami inundation zone and potential losses, combined with an effective tsunami evacuation plan.


2021 ◽  
Vol 4 (1) ◽  
pp. 61
Author(s):  
Muchsin Riviwanto ◽  
Darwel Darwel ◽  
Defriani Dwiyanti ◽  
Juanda Juanda

Disability groups are groups vulnerable to disaster risk. Most families with disabilities feel worried about defending themselves in the event of a disaster. They are less socialized with disaster mitigation efforts. This research has provided an overview of the preparedness of families with disabilities children in increasing disaster resilience. Analytical research was conducted on families with disabilities children in the city of Padang. Data collection tools in this study used a standard questionnaire from LIPI-UNESCO / ISDR. The data were processed by a computer and analyzed using multiple regression statistical tests. The results showed the preparedness of Families With Disabilities Children in the face of disasters; it was seen that the knowledge category was ready (42.2%), the preparedness plan category was not ready (37.8%), the disaster warning category was not ready (46.7%), the resource mobilization category was not ready, ready (82.2%), the tsunami disaster preparedness index value is 57% (ready category). This research recommended local governments must provide special treatment for people with disabilities by increasing training, seminars, and disaster simulations.


2021 ◽  
Vol 19 (1) ◽  
pp. 1-9
Author(s):  
Permana Ari Soejarwo ◽  
Rismawaty Rusdi ◽  
Taryono Kodiran ◽  
Umi Muawanah

Indonesia coastal areas have considerable natural disaster potential including in Kalianda District South Lampung Regency. Natural disasters such as earthquakes, tsunamis and volcanic activity are likely to occur in coastal areas. The disaster has an impact on economic losses in the marine tourism area. In order to mitigate tsunami disasters in the marine tourism area of Kalianda District, South Lampung Regency, 3 (three) types of tsunami mitigation are needed, namely: construction of coastal protection, installation of the Tsunami Early Warning System (TEWS) and planting of coastal vegetation. This study aims to determine the value of willingness to pay (WTP) of community and tourists in supporting the management of the three types of tsunami disaster mitigation above by using economic valuation / Contingent Valuation Method (CVM). The results of this study indicate that the WTP value of community for coastal protection management is Rp 15.547/person/month while the WTP value of tourist is Rp 12.030/one time entry. Meanwhile, for the WTP value of TEWS management is obtained Rp 12.174/person/month. WTP value for the management of coastal vegetation is Rp 12.444/person/month. The WTP calculation is based on consideration of 3 (three) factors, namely age, income, livelyhood and education level. This research shows that the community and tourists are willing to pay for the management of the three types of tsunami disaster mitigation through BUMDes and entrance fees for marine tourism area. The three types of tsunami disaster mitigation can protect, provide security and calm to the community and tourists in the marine tourism area of Kalianda District, South Lampung Regency from future tsunami.


Crisis ◽  
2021 ◽  
Author(s):  
Masatsugu Orui ◽  
Suzuka Saeki ◽  
Yuki Kozakai ◽  
Shuichiro Harada ◽  
Mizuho Hayashi

Abstract. Background: People who experienced the Great East Japan Earthquake (GEJE) were expected to have additional levels of psychological burden resulting from the stressful conditions imposed during the coronavirus disease 2019 (COVID-19) pandemic; consequently, suicide rates may increase. Aim: We aimed to carry out continuous monitoring of suicide rates in the affected area following the GEJE under COVID-19 pandemic conditions. Method: This descriptive study monitored the suicide rates of the coastal area of Miyagi Prefecture, where disaster-related mental health activities have been continuing following severe damage caused by the tsunami disaster. An exponential smoothing time-series analysis that converted suicide rates into a smooth trend was conducted. Results: Although the suicide rate in the affected area was higher than the national average in February 2020, it showed a declining trend during the COVID-19 pandemic, while showing an increase trend in the national and non-affected areas. Limitations: Uncertainty about the direct reasons for suicide and the short time-scale observation are the limitations of this study. Conclusion: Although the national suicide rate increased, this was not the case for the affected area. Our findings may provide important lessons for suicide prevention during the COVID-19 pandemic, which needs careful regional monitoring of the state of suicide and of high-risk approaches such as disaster-related mental health activities.


Author(s):  
RIZKY RAHADIAN RAMDHANY ◽  
AFRA DN MAKALEW

ABSTRACT Coastal Landscape Planning in Pangandaran Based on Tsunami Disaster Mitigation The Indonesian archipelago has a long coastline of about 81,000 km. Some coastal areas in Indonesia, classified in areas with high risk of tsunami. The objective of this research was to develop a coastal planning in Pangandaran and provide recommendations related to tsunami disaster mitigation. The tsunami ever occurred at the site studied, namely in 2006. The method used in this study is a modification of the method of planning (Gold 1980) which comprise the step of preparation, inventory, analysis, synthesis, and planning. Analysis is conducted analysis of regional vulnerability to tsunamis. The results from the analysis found that Pangandaran beach is classified as an area highly vulnerable to tsunami, based on an assessment of the slope, elevation, land use, distance from the river and distance from the coast. Analysis of the suitability of the area for evacuation was conducted to determine the exact area used as a tsunami evacuation. The concept of planning is divided into space concept, the concept of activity, the concept of infrastructure, circulation concept and the concept of vegetation. The concept that there is then developed to produce a landscape plan, plan activities, circulation plan, vegetation plans, and plan infrastructure facilities. Keywords: coastline, mitigation, Pangandaran, planning, tsunami


2019 ◽  
Vol 1417 ◽  
pp. 012095
Author(s):  
Utama Alan Deta ◽  
Putri Zulaiha ◽  
Ria Agustina ◽  
Rizki Nur Fadillah ◽  
Irvan Prakoso ◽  
...  

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