1989 年 1989 巻 14B 号 p. 59-66
Many methods have been proposed to distinguish between dune, beach and river sand. In this paper a method of multivariate analysis is applied to investigate the subsurface distribution of dune sand. The numerical criterion for discrimination between dune and non-dune sand is calculated from the granular variations of dune sand which are taken from the surface of the investigated area. Based on the results obtained, the internal structure of the dunes developed along the coast of the Niigata Plain is discussed.