Abstract
In order to establish preservation methods of coastal vegetation at a rivermouth of a small river, we investigated the relationships between grass vegetation and micro-topography on the sandbanks of four small rivers in Osaka Bay, Japan. We set transects in each river sandbank and measured topographies along them twice in September and December 2006. We recorded grass species name and vegetation coverage ratio in September 2006. As the results, no plant was found at which topography was highly variable due to tide level between September and December 2006. Along those transects, larger amount of vegetation was observed toward the river side from the sandbank ridge than toward sea side. Moreover, coastal grasses were well observed in the low-lying parts of the transect.
