抄録
Forested bars with large relative height between channel bed and bar surface is one of the typical figures in gravel-bed rivers. That causes strong meandering flow and bank erosion in several medium-size floods. In this study, such a morphological feature in gravel-bed rivers with double-row bars is investigated considering interaction between wood land expansion and channel formation process. A depth-averaged flow and bed-variation analysis is carried out introducing the events of invasion and destruction (wash-out) of riparian trees. Result of the simulation shows formation of a single strong meandering channel with fixed bars which can be seen as a resent channel characteristic in double-row bars with vegetation.
