河道掘削後の河川氾濫原の変化過程に関する考察

抄録

We studied a changing process of river cross-sections and the resulting change of riparian vegetation after the excavation of a river channel. The study was conducted on how floods changed the cross sections and finally affected the vegetation environment, based on data and information accumulated for ten years after the excavation together with research on current conditions of vegetation and soil. As a result, the reproduction of a salix community was confirmed in the excavated area. The invasion and growth of the salix species in the river channel was analyzed in relation to the frequency, duration and depth of inundation. Floodplain pools on the uneven surface of the river channel after the excavation may have generated a favorable condition for the growth of the salix species.