石川海岸八田地区の汀線位置変化に関する基礎的研究

抄録

Ishikawa coast forms a long segment of shoreline in the center of Ishikawa Prefecture. Most of segments on Ishikawa coast were eroded from 1947 to 1969. After the construction of offshore breakers and artificial reefs to protect the coast, the shorelines in the lee of the coastal structures have advanced and formed salient but the shorelines which are not protected have receded. To investigate a quantitative property of shoreline changes, field observations with DGPS have been conducted. As a result, the spectral analysis based on the observed data tells that the spatial change of the unprotected shorelines fluctuate more frequently than those of the protected shorelines.