涸沼における湖岸植生帯再生のモニタリング調査報告

抄録

Field experiment of the lakeshore restoration for creating habitat of animals and vegetations using beach nourishment was carried out in Lake Hinuma. The changes in lakebed topography, grain sizes of bed materials, water level and salinity had been monitored after the beach nourishment. Due to the storm waves caused by typhoon 0709, nourished sand was moved up to the depth of closure of 1.0 m below the mean water level. A barrier island with a 0.25-m-high berm was formed due to the cross-shore sand transport, and the results are in good agreement with the expected results in the previous paper. The grain size sorting of bed materials in the depth zone shallower than the depth of closure was observed. A wetland was formed landward of this barrier, and the lakeshore vegetation was stabilized by the formation of this barrier.