薩摩半島南岸沖の底質と底層流について

概要

論文の詳細を見る
The bottom samples used for this study were collected from 27 stations off southern Satsuma Peninsula at a depth of 53-355 m in March 1993. All samples were taken using a Smith-McIntyre grab sampler. The main purpose of the study is to clarify the relationship between characteristics of the bottom sediments and environmental conditions. The results of mechanical analysis of the bottom samples are summarized as follows : 1. The bottom sediments off southern Satsuma Peninsula are characterized by very fine grained sand except for two stations (Stn. 15, 16). 2. Judging from the sediment distribution of the sea area, the longshore bottom current flows westward along the coast, while the surface current flows eastward. The westward longshore current is forced to change its direction by the existence of Tachigami Cape towards southwest. 3. In the area (Stn. 15, 16) at the foot of steep sea cliff, the features of bottom sediments are characterized by high mud contents (> 62% ; Md φ : about 6 φ) and negatively skewed (> - 0.33). From these characteristics of sediments, it may be inferred that the water mass of the area is comparatively stagnant because the area is at the foot of steep cliff, and accumulation of fine grain sediments is superior to other areas.
鹿児島大学の論文
1997-12-24