2008 Volume 52 Pages 1213-1218
Urgent measures protecting lakeshore vegetation have been carried out at eleven locations in Lake Kasumigaura since 2000. In these measures, beach nourishment was carried out to create a stable growth zone of lakeshore vegetation along the lakeshore, using wooden offshore breakwaters, submerged breakwaters and artificial berm produced by stones. Aerial photographs were compared to investigate the stabilization effect of the ground by these structures as well as the analysis of bottom sounding data. It was found that in the past restoration method of lakeshore vegetation, the consideration regarding dynamic changes of lakeshore due to wave action was insufficient. To create a stable lakeshore ground, wave action and beach changes at each location must be deeply considered.
