2:30 PM - 3:00 PM
*Masaru Kunitomo1,2,3,4, Shigetaka Takiguchi1,2,3,4, Fumiaki Akazawa1,2,3,4, Kazuyuki Imai1,2,3,4 (1.Ministry of Land, Infrastructure, Transport and Tourism, 2.Water and Disaster Management Bureau, 3.Sediment and Erosion Control Department, 4.Sediment and Erosion Control Planning Division)