2019 Volume 25 Pages 577-582
Riparian forests are important as a component of natural habitat and landscape. However, in the case of flooding, their dense stand becomes a factor that limits the flow capacity. Therefore, appropriate management of riparian forest is needed to improve safety in flood disaster. In Hokkaido, Salix species dominate riparian forests, and they grow quickly even if they are felled. In this study, we investigated the interannual changes in tree heights, diameters at breast height, and the number of resprouting stems after felling Salix species. In the third year, the result showed that the number of resprouting stems increased 2.5 to 3.8 times compared with before felling and tree heights and diameters reached up to 7.0 to 7.8 m and 5.8 to 7.7 cm at maximum, respectively. These may have a negative impact on the water level in flood.
