Abstract
This study shows that a linear river was changed meander by putting spur dykes that made by ishumaruzumi. In addition some shallow water zones and deep water zones were formed in this river. Those spur dykes passes for ten years, but it has controled flow. Infinitesimal grain sands collects behind a spur dykes and, many plant begin to bring it up after waeds in the place. And the luxuriant growth of this plant makes topography change stable. Those above-mentioned results local observation and photograph data. Meandering width became narrow and prevent the erosion of right bank slope by building a breakwater installed in the right bank, but erosion occurs newly in the front part of building a breakwater.
