感潮域河道内氾濫原における侵食流路と浸出水に関する研究

抄録

There are a lot of small-scale channels at flood plain promoted by series of groins in the lower Kiso River. The tidal motions as well as the intricate geomorphology provide habitats for many organisms. In the present study, the mechanism of the formation of erosion channels has been investigated. Results of the field surveys for channel shape and flow condition due to tidal motion have indicated that the channel has been eroded by water discharged from subsurface flow associated with the tidal motion. The erosion process of the channel has been simulated, and the effects of permeability of the deposition and tidal condition on the erosion process have been discussed.