大潟海岸における海岸変形の特性について(2) ―海浜地形の特性―

Abstract

Field investigations were conducted to find morphologic characteristics of Ogata coast facingJapan Sea in 1972. The data concerning the distributions of characteristics of beach configura-tion along the coast ranging from Naoetsu to Kakizaki are described in this paper.The results are summarized as follows.1) Shoreline landform on the coast from Naoetsu to Kakizaki reflects bottom configuration withinsurf zone. Interval of large cusps (or distance between seaward projections) tends to decreasegradually frons eastern part to western of this coast trending WSW-ENE. Estimated interval oflongihore bars shows similar tendency. Longshore distribution of these characteristics correspondsto that of bottom slopes.2) Characteristics of beach configuration, such as width of large cusps (or distance between theinner part of embayment and projections), interval of cusps and beach slopes, are considered.It was concluded from the consideration that the results have a similar tendency decreasing graduallytowards Naoetsu and Kakizaki and being become small near Ogata between these locality.