Abukuma River Basin 2 to 3 times the rain in October, about 2 days
When the Meteorological Agency analyzed how the Abukuma River basin rained when flooding and levee breaks occurred, the amount of rain equivalent to two to three times that of the first month of October in the river was found upstream and downstream of the river. , It turned out to be a record heavy rain falling within just 48 hours. The typhoon is accompanied by a strong rain cloud over a wide area, and it seems that a large amount of rainwater has flowed into the entire basin, and it seems that the situation was the same in other rivers.
Regarding the rain of Typhoon No. 19 this time, the Japan Meteorological Agency calculated the amount of rain that occurred in 48 hours from noon on the 11th to noon on the 13th of this month. We analyzed in detail every kilo square.
As a result, in the Abukuma River, rainfall exceeded 300 mm in the vicinity of Shirakawa City, Fukushima Prefecture, upstream, and in some areas, it reached 400 mm or more in the vicinity of Marumori Town, Miyagi Prefecture, which was downstream.
This is two to three times the amount of rain in October of the normal year, and it was a record heavy rain with this amount of rainfall falling within only 48 hours.
About this, Naoji Nakamura, a forecaster for the Japan Meteorological Agency Forecasting Division, said, “There is a lot of rain in the Abukuma River both upstream and downstream, and a lot of water has flowed in. The typhoon headed from Kanto to Tohoku. A lot of rain continued before it came, and finally the typhoon's rain added and the amount of rain increased, '' said the typhoon was accompanied by strong rain clouds over a wide area, etc. It seems that rainwater flowed in, leading to inundation and bank breaks.
And, it was thought that the situation was the same in other rivers. “In large rivers, the rain that has flown upstream flows downstream over time, so the water level rises even after it rains. I want you to think about evacuation by looking at how the rain falls upstream.Because it is expected to rain this weekend, please pay attention to future weather information and evacuate early depending on the situation. It was.