我国自古以来,就是一个多水灾的国家,尤其我国东南沿海地区常遭受台风、暴雨、海潮“三位一体”的侵袭,造成严重水灾。特别是浙江钱塘江口的杭州湾,海潮之大,是世界闻名的。因此,我们的祖先很早就在钱塘江口筑堤防潮,护卫长江三角洲富庶的农业生产区。 Since ancient times, our country is a flood-hit country. In particular, the southeastern coastal areas of China are often hit by the “Trinity” of typhoons, torrential rains and tides, causing serious floods. Especially the Hangzhou Bay at the mouth of Qiantang in Zhejiang Province, the vast tidal wave is world famous. As a result, our ancestors embarked on a flood of embankments in the Qiantang Estuary long ago to protect the affluent agricultural production areas in the Yangtze River Delta.