一、引言自从地球上出现人类并过着群居生活的时候起,人们便与“靠水吃水”和“与水斗争”相依为命了。也就是说,“用水”和“治水”与人类的历史是伊始与共的。日本民族最早碰到的也是水的问题,到登吕遗迹以后,粗知治水和用水即防洪与农业用水的问题。而登吕遗迹时,大家对公部河上游流送下来的泥沙 I. INTRODUCTION Since the emergence of mankind on Earth and living of colony, people have become dependent on “watering by water” and “struggle with water”. In other words, “water ” and “water ” and the history of mankind from the beginning. The earliest encountered by the Japanese nation was also the problem of water. After the relics of Dengyu were ruled out, the issue of water treatment and water use, namely flood control and agricultural water use, was crude. When Deng Lu relics, everyone on the public river upstream sediment sent down