2010 年 16 巻 p. 113-118
The bed level of the Asa river which is the main tributary of the Tama river has degraded considerably for over the last 35 years and local bed scouring and shale-bed exposure have caused serious problems for river manegement. To recover riverbed level, it is important to introduce a new technology such as capture of moving sands and gravels during floods.
To develop the method of bed level recovery in the Asa river, we performed field tests under the concept that large stones placed in the proper manner of arrangement in the stream captured sediments from upstreams. We performed field tests of river bed level recovery and evaluated validity of the new technology by two-dimensional riverbed variation analysis using field test data.
