2016 年 22 巻 p. 373-378
It is important to enhance a safety level of flood control in the Kinu River which suffered from huge damage due to overtopping and levee breach in 2015 large flood. However it is not clear how both of the considerably longitudinal change in river width and densely growing bamboos in the flood plain affect discharge capacity, river storage and riverbed stability. In this paper, we develop the numerical model applying the BVC method and 2D bed variation using observed water surface profiles during 2015 flood in the Kinu River taking account of the considerably longitudinal change in cross section and resistance of densely growing bamboos in the flood plain. The developed model revealed the discharge capacity, flood storage volume and riverbed stability and effects of longitudinal change in river width and riverine bamboos. Finally, issues of the future improvement and maintenance of the Kinu River are discussed.
