荒川下流のヨシ原保全・再生に向けた航走波対策による効果の検証

抄録

In the downstream of the Arakawa river, reeds decreased growing areas due to flood channel construction and erosion caused by ship-generated waves. Therefore, the countermeasures for the conservation and restoration of reed comunity have been conducted for twenty years.

This report describes the maintenance effect by investigating the time changes in topography and reed community in the Komatsugawa and Senju Sakuragi Districts.

In the Komatsugawa District, the increase in the reed community and the species number of the benthic animals were confirmed by the effect of countermeasures , The reeds are protected by the wave energy dissipating facilities at the Senju Sakuragi District. Since any expansion of reed community was not found, tree management and reed transplantation are planned for the recovery of reed community.