Successive typhoons “Land” site gathers attention on October 23, 20:26
It has been over 10 days since the heavy rain disaster caused by the typhoon No. 19 that caused enormous damage. Next is Typhoon No. 21. How long will the “Aki Typhoon” last? On the internet, attention has been focused on sites where you can easily and easily learn about the characteristics of the land where you live to protect yourself from floods and other disasters.
(Network reporter Asako Wada, Naoko Okubo, Shintaro Matsui)
Typhoon-prone conditions continue
According to the Japan Meteorological Agency, Typhoon No. 21 is in the south of Iwo Jima at 6 pm on the 23rd, and then changes to a temperate cyclone around Saturday 26th to reach the sea east of Japan.
Will another typhoon come closer to Japan after this?
According to the weather counseling office of the Japan Meteorological Agency, the mechanism of typhoon generation has not been elucidated, and it is difficult to predict the occurrence of typhoons over the medium to long term. The high situation has continued for the past few years, and typhoons are more likely to occur.
The case that landed in November
The average monthly typhoon situation since 1951, when we started collecting statistics, occurred 3.6 times in October, 2.3 times in November, and 1.2 times in December. Typhoon 28 landed in Wakayama Prefecture in November.
The weather counselor said, “It is very possible that typhoons will occur in the next month and approach Japan.
What are the risks lurking in the land?
Is the place where I live safe?
The site where you can know the changes of the land is now popular.
You can compare the current map with the map after the Meiji era in 37 regions nationwide, centered on the prefectural office location.
For example, Urayasu City, Chiba Prefecture, where liquefaction was severely damaged by the Great East Japan Earthquake.
When you search for the coast of the city, you will see an old map on the left and a current map on the right. The old map shows changes in the Tokyo metropolitan area every nine ages from 1896 to 2005 in the Meiji era.
If you look at the age since 1896, you can see that the area where the sea had spread was gradually reclaimed, and from 1975 to 1978, it became almost the same as the present terrain.
(Professor Kenji Tani of Saitama University who developed the site) “During the Great East Japan Earthquake, liquefaction damage was concentrated in the newly reclaimed land in Tokyo and the coastal area of Chiba Prefecture. You can find out if your place of residence is a landfill. ''
The site's daily access is usually around 8000, but recently it has tripled.
(Professor Tani) “After a series of typhoon damages, there are an increasing number of people seeking information as to whether their place of residence is really safe. If it is, it will become an underground waterway, and knowing what risks are hidden, such as the danger of overflowing in an emergency, is important information to protect yourself. ''
“Geographical Institute Map”
There are other sites where you can learn about the characteristics of the land where you live.
Detailed information for each district
This is the “Geographical Institute Map (Electronic National Land Web)” created by the Geographical Survey Institute.
From the field survey and aerial photographs of the Geospatial Information Authority of Japan, it is possible to investigate in detail each area about the formation of land and the natural disaster risk of topography.
It has been released for about three years, and it entered the “Information” item from the top screen, and became a “vector tile provision experiment”.
Then, when you select a district from "Terrain Classification (Natural Terrain)", information on the land is displayed.
For example, if you look at 2 Jinnan, Shibuya-ku, Tokyo, where NHK is located, “the formation of the land” will be displayed as “flat land that is higher in steps than the surroundings”, and “disaster risk” will be “the slope of the edge” “Be careful of landslides nearby”.
Although it is not displayed in all areas, Yasushi Ono of the Geographical Survey Institute's Planning Department, Geographical Survey Institute says, “I want it to be one of the materials to know in advance about the dangers of the surrounding land.”
Stone monument sue
In addition, the display of the “Natural Disaster Tradition Monument” has started on this map.
It is a monument or monument that describes the damage situation of past tsunamis, floods, volcanic disasters, and earth and sand disasters.
The predecessor is built in various places to tell the generations about the disaster that occurred on the land.
However, since it seems that these monuments are often overlooked by locals, the Geographical Survey Institute requested that local governments apply to display the monument information in an easy-to-understand manner and display it on a map. is.
When you enter the “Information” item from the top screen of “Geographical Institute Map” and select “Natural Disaster Tradition Monument”, it is displayed in green on the map.
You can also find out the number of victims and victims by clicking on the picture of the legend.
(Mr. Ono of the Geospatial Information Authority of Japan) “Some areas have not yet been displayed due to the efforts that have just begun. I want it as a guideline. "
On the internet, posts introducing the site created by the Geographical Survey Institute were retweeted approximately 190,000 times and spread quickly.
In the reaction of posting, there is a note of a person who was affected by the disaster.
A typhoon that is no stranger to anyone at any time.
If you knew it, there might have been a protected life or a preventable damage.
I think it is important to make preparations so that you do not regret it.