Kyushu's first-class river "flood risk water level" has an approximate rainfall of 20:35 on September 5th.
Professor Yasuo Nihei of Tokyo University of Science, who is familiar with the mechanism of flooding of rivers, said that for the first-grade rivers of Kyushu, how much rain falls in the basin, the water level of the river exceeds the "flooding dangerous water level" where the risk of flooding is very high. I checked based on past rain and water level data.
The feature is that the guideline shows the rainfall for 24 hours in the basin so that it can be compared with the forecast rainfall announced by the Japan Meteorological Agency.
The standard is as follows.
Kagoshima prefecture
▽ Kawauchi River
▽ It is 200 mm to 250 mm in the liver river.
Miyazaki Prefecture
▽ Oyodo River
▽ Gokase River
▽ Komaru River It is 300 mm to 350 mm.
Kumamoto Prefecture
▽Kikuchi River
▽Shirakawa
▽Kuma River
▽Midori
River
is 200 mm to 250 mm.
Fukuoka Prefecture
▽ Onga River
▽ Chikugo River
▽ Yabe River is 200 to 250 mm.
Saga Prefecture
▽ Matsuura River
▽ Rokkaku
River
▽
Kase River is from 150 mm to 200 mm.
Nagasaki Prefecture
▽The Honmeikawa is 250 mm.
Oita Prefecture
▽ Yamakuni River
▽ Oita River
▽ Ono River is 200 mm to 250 mm.
▽ Banshogawa is 350 mm.
Prof. Nihei said, "I would like you to consider the estimated rainfall for each prefecture announced by the Meteorological Observatory as a guideline for the rainfall in the basin. Please be careful of the information and try to evacuate as soon as possible."