INVESTIGATION ON KINU-RIVER FLOOD DISASTER AROUND JOSO-CITY IBARAKI PREFECTURE OCCURRED BY KANTO AND TOHOKU HEAVY RAIN IN SEPTEMBER 2015

Abstract

 Heavy precipitation event occurred for 8 to 10 September, 2015, over Tochigi and Ibaraki Prefectures caused an over-topping and an outburst of the left levee of Kinu-river in Wakamiyato and Misaka-cho districts in Joso city, Ibaraki prefecture around 6am and 1pm on 10 September, respectively. This precipitation event was caused by clustered linear rain bands influenced by Typhoon Etau (No 18) and Kilo (No 17). This paper aims to report our field investigations held on 10, 15, and 19 September, and to raise a couple of discussions for further improvement of flood control and river basin management in Japan.