Project News

Visited the site of river channel clogging mark at the Niyodo River in 1707

On January 27th, Mr. Hariyono Utomo, the chief of Sabo Technical Center, Directorate General of Water Resources, Ministry of Public Works, and Mr. Edy, the head of Bakesbang (Residents protection agency) in Jember District, who have joined the counterpart trainings, made a courtesy visit to Mr.Issei Ishii, the director of the Prefectural civil engineering department, in Kochi Prefecture government building. Then they listened to a lecture, "Extract of micro-topography as premonitory phenomenon at landslide occurrence" by Prof.Katuo Sasahara, Faculty of Agriculture, Kochi University. Also, a question-and-answer session of the previous day's training about river cannel clogging was held.

In the afternoon, they visited a site of river channel clogging mark in the midstream of the Niyodo River (Ochi town in Kochi Prefecture). It was formed by Hoei Nankai Earthquake in 1707. Due to various investigations and hearings from elders in local villages, it assumed that this river clogging stopped water for 4 days and it flooded at the full of 18m water level and caused disaster to Ino town, the lower stream area of Niyodo River.

Also, they visited anticipated river cannel clogging points adopted at the previous day's training, and landslide point at Route 33 introduced at Prof. Sasahara's lecture. Trainees interestingly watched the site because the landslide point was under renovations such as mortar spraying and grating crib works. Also giant rocks were covered with net and work to hold the net with anchors has been processed.

At the day, trainees were chilled with the cold weather such as almost 0 ℃ which was very rare in Kochi.