The government office is submerged and isolated. The cause is 1m of ground subsidence.
It was found that the subsidence of the ground around Marumori Town Hall in Miyagi Prefecture, which had been inundated by heavy rain of Typhoon No. 19, had progressed about 1 meter in the past 30 years after the government building was built. It was.
The photo above shows the foundation of a rain guard post made of stone.
In Marumorimachi, the government office was flooded and the government office where the disaster response headquarters was located was isolated for two days.
The area around the government building built in 1986 was a wetland that was originally a rice field, and the ground was weak, and it was discovered by interviewing the town that land subsidence had progressed for about 1 meter over the past 30 years. .
The photo on the left is the government office just after construction.
The government building itself is not sinking because it is hard to harden the hard part of the ground deep underground, but the site such as the surrounding parking lot has been sunk and repeated renovation, and the stairs that were not immediately after construction at the entrance In addition, the foundations of the rain-proof pillars are exposed, so additional construction with stone is being performed.
The town has stopped flooding damage by draining water to nearby rivers with three pumps during heavy rains, but the drainage could not catch up with this typhoon and it was submerged near the entrance, so it was isolated It seems to have led to.
Marumori Hoshina, Mayor of Marunomori-machi, said, “Even though I was appointed as the mayor nine years ago, the land has been submerged by about 20-30 cm. Until now, we were able to deal with pump drainage, but the surrounding area was flooded by unprecedented heavy rain.