5:15 PM - 6:45 PM
*Masanori Nunokawa1, Atsuyoshi Miura2, Yusuke Sato2, Yutaka Gonda3, Rumiko Kajihara1 (1.Civil Engineering Research Institute for Cold Region, Public Works Research Institute, 2.Sapporo River Office, Hokkaido Regional Development Bureau, 3.Faculty of Agriculture Niigata University)