高知港の津波に関する模型実験(2) ―津波防波堤の効果と河川流量の影響について―

Abstract

Tsunami model experiment of Kochi Harbour has been continued by use of a hydraulic model.Refering to the reproductivity of the tsunami which was proved formerly, this paper presents theresult of the model experiment of tsunami with the consideration of the river discharges in KochiHarbour.At first, the influence of the tsunami breakwaters upon the backwater is studied under the con-ditions of the given river discharges and of the given water level at the entrance of the harbour. Itwas found that the construction of tsunami breakwaters causes to increase the water level in theharbour. Secondly, transformation of the design tsunami is studied under the condition with thegiven river discharges. Distributions of the tsunami height are compared for two conditions: 1)with the tsunami breakwaters but the river discharges and 2) without the tsunami breakwaters andthe river discharges given. The experiment shows that the distributions for the two conditions aresimilar to each other.