抄録
In mountain streams, it is assumed that microforms create various river regimes and habitat. But, there are not many studies of microforms in mountain streams. In this study, we conducted a survey in the Ohoyama River, a tributary of the Chikugo River. First, we observed the detailed flow regimen by using River Surveyor M9 and gathered algae attached to rocks. Second, we predicted water depth and flow velocity for each flow rate using 2D numerical analysis. As a result of the current analysis, we clarified the relationship of the flow regimen and the amount and species of algae attached to rocks. In addition, we examined the possibilities for applying this type of study to river environment regeneration.
