SENDAI -Towards a Disaster-Resilient and Environmentally-Friendly City

Hazard Maps

Earthquakes

Sendai City created three types of earthquake hazard maps in 2008. The first is a “Tremor Map” that shows the average strength of shaking that would be expected based on the scale of the earthquake and the distance from the epicenter. It is based on the periodic earthquakes off the coast of Miyagi Prefecture. The second is a “Regional Danger Map” that relatively shows the distribution of building damage (equivalent to total destruction) due to the effects of shaking and liquefaction that would be expected based on the scale of the earthquake and the distance from the epicenter.
The third is a “Assumed Liquefaction Map” that shows the possibility of soil liquefaction due to the tremors that would be expected based on the scale of the earthquake and the distance from the epicenter. Sendai has been split into 50 m squares, with maps made for each square (mesh). We have also created a map that shows the potential effects of an earthquake caused by an active inland fault line (the Nagamachi-Rifu fault) as a reference.

InquiriesImprovements in the earthquake resistance of wooden houses:
Construction Guidance Section, Urban Planning Bureau
tos009420@city.sendai.jp

Tsunamis

A tsunami evacuation map for Miyagino Ward was created with distribution starting in December 2010, and another was created and distributed for Wakabayashi Ward in February 2011. However, due to the extensive damage caused by the Great East Japan Earthquake that occurred just after this, the first “Tsunami Evacuation Guidelines (Preliminary Edition)” was published in October 2011 based on lessons we learned from the earthquake, and has been revised 3 times.

InquiriesDisaster Prevention Planning Section,
Crisis Management Department
kks000120@city.sendai.jp

Sediment Disasters and Flood Damage

A map that showed predicted flood damage in Sendai was created and started being distributed in 2005. As the number of landslides in Japan caused by heavy rain has increased in recent years, we now have materials available at each ward office, and since 2014, on the City website showing the areas that are likely to be affected by sediment disasters, and since 2016, the areas that are likely to flood or be affected by sediment disasters have also been shown. These materials show how to prepare and what to do when a disaster occurs. A more detailed scaled version is available upon request from City Hall and in each ward office.

InquiriesDisaster Prevention Planning Section,
Crisis Management Department
kks000120@city.sendai.jp

Inland Water (Map of Assumed Flood Areas)

This map shows a simulation of flooding that would occur if rainfall equivalent to that of September 19, 1990, the heaviest rainfall per hour recorded in the past 50 years, fell across all areas of the sewage system. The map was created and distributed in 2013 so that residents know in advance what level of flooding they might experience in their local area, and to minimize the damage.

InquiriesSewerage Planning Section,
Construction Bureau
ges011210@city.sendai.jp