瀬戸内海における海水交流の実験的研究 (II)

Abstract

The aspect of water exchange between Seto Inland sea and the Pacific Ocean is studiedwith use of the hydraulic model, of which the horizontal and vertical scales are 1/50000 and1/500 respectively.Sea water in Seto Inland Sea is replaced mainly with that in the Pacific Ocean throughtidal mixing, and the effects of the constant flow passing through the inland sea and river dis-change on the replacement are rather small. And the sea water which exists in the inlandsea at some instant decreases approximately in the exponential form, then, like a radioactivedecay process, it has a half life time, about 350～460 tidal cycles. But these values of the halflife time predicted by the model experiment may be too small, because of the velocities of tidalresidual circulations in the model are larger than those in the prototype.