Abstract
Geometrical similitude of the plane shape of a recurved sand spit of various scales found in lakeshores and on sandy beaches is investigated. It is found that the method originally proposed by Hsu-Evans as a predictive model of the plane shape of bay-shaped beaches is applicable to the general expression of of the plane shape of a recurved sand spit. The method is applied to Wadabana spit in Lake Kasumugaura, Wadanohana spit in Tokushima Prefecture, Notsukezaki compound spit in Hokkaido, Mihono-matsubara compound spit in Shizuoka Prefecture and Sandy Hook on the U.S. east coast.
