鴨川水害史(1)

Abstract

Heian-kyo (the old name of Kyoto city) was the capital of Japan since 794 and has the historyof 1200 years until now. Many national and private diaries are available for the study of the floodsof the Kamo river flowing through Kyoto city. Kyoto Meteorological Observatory has the data ofthe heavy rainfalls in this area for more than 100 years. The causes of the floods in these 100 yearsare analysed and it is found that 60% of the floods were due to Baiu-front and the other 40% weredue to typhoons. Old records of floods are also analysed and the causes of them are classified intotyphoons and fronts as much as possible. The phase of the change in the frequencies of floods iscompared with the climatic change in Japan and in the other countries.