Typhoon No. 10 Oyodo River in Miyazaki may also be inundated Prior evacuation September 5, 19:06, MLIT
The Ministry of Land, Infrastructure, Transport and Tourism's Miyazaki River National Highway Office calls for early evacuation, saying that this time typhoon 10 may flood the first-grade river "Oyodo River" flowing from the western part of Miyazaki prefecture to the center of Miyazaki city. ..
In the prefecture, the Ministry of Land, Infrastructure, Transport and Tourism estimated on the 5th on the basis of the estimated rainfall amount, and it exceeded the standard rainfall amount to maintain dikes on the Oyodo River, Komaru River, and Gokase River, and the dike collapsed, We know that the risk of flooding can be very high.
Of these, the Oyodo River is a first-class river that flows through Miyazaki City in the western part of the prefecture and flows through the center of Miyazaki City. Regarding points to note, the Miyazaki River National Highway Office of the Ministry of Land, Infrastructure, Transport and Tourism, which manages the river, I responded to the interview.
The point that requires special attention is the point where the Oyodo River and the tributaries merge.
Specifically, both are near the confluence of the Takasaki River in Miyakonojo City and the confluence of two tributaries, the Yokoichi River and the Okimizu River.
It is said that these places have a large flow volume and the river width of the confluence is narrow due to topography, and there is a risk that the river water will cross the embankment and flood.
We also point out that flood damage may occur in a wide area of the Oyodo River in Miyazaki City, which is downstream from Miyakonojo City.
On the Oyodo River, during Typhoon No. 14 in 2005, which caused 13 deaths, wide areas were flooded in Miyakonojo City and Miyazaki City, causing damage to approximately 4,700 buildings.
The Miyazaki River National Highway Office calls for early evacuation because the typhoon this time may cause flooding not only in places where flood damage has occurred in the past, but also in other places.
The Miyazaki River National Highway Office said, “Every year, the levee has collapsed, causing tremendous damage. Even on the Oyodo and Komaru rivers, it is normal for any amount of rain to exceed the planned rainfall. There are many places on the Oyodo River that are being planned and maintained, and it cannot be said that if the river water crosses the embankment, the embankment will not be destroyed. Please check the hazard map and try to evacuate as soon as possible."