黒潮流軸データとADCP流速データを用いて，黒潮を利用した海流発電の適地を調べた．その結果，トカラ海峡は海流発電の適地であることを明らかにした．特に，口之島と中之島においては，黒潮の強流帯が沿岸近くに位置していることを示した．口之島北端部と中之島南端部の水深60m以浅の海域において，0.8m/s以上の流速が水平方向に約1.5km以上にわたって分布していた．また，数値モデル（DREAMS）の計算結果は中之島南側の海域の方が口之島北側の海域よりも海流発電に適していることを示唆した．

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In order to make clear the characteristics of water exchange at the entrance of Kagoshima bay in the season of stratification, the field observations on the velocity and density fields were carried out, and then the results on the residual currentswere examined. As a result, the following findings were obtained; 1) Two kinds of flow pattern of residual current “inflow at the upper layer and outflow at the lower layer” and “outflow at the upper layer and inflow at the lower layer” were observed. 2) The residual currents are regarded as the density-induced current, because those vertical patterns havestrong correlation with the vertical profiles of the horizontal gradient of baroclinic pressure.

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