Water is a great craftsman wiio has sculptured the Three Gorges of the Yangtze River. And water is also the headspring of all the life on the earth that has nurtured the resplendent Yangtze Civilization. To some extent, the Chinese immemorial times was a long history in which the Ancients coexisting with the Flood. The YAO-SHUN-YU era in myths was the period when the Yangtze Noachic Flood happened frequently. DAYU is a great ancient hero widely known for his water-control in Chinese mythology and legend. He was the founder of the first unified kaiserdom-XIA dynasty. The famous story about DAYU's water-control was happened 4000 years ago. One of Chinese geographic sutras Shang Shu-Yu Gong recorded that DAYU had triumphant dredged up the mainstream and many branches of the Yangtze River, another sutra Shui Jing Zhu has mentioned that the watercourse of the Three Gorges of the Yangtze River was excavated by DAYU. The legend about DAYU's water-control is widely spreaded and the deep adoration to DAYU is prevalent in Yangtze delta, especially in Taihu basin. In several stratums of the Neolithic age where deficient of culture trace massive mud was deposited. According to certain expert, that is the result of the Flood happened 4000 years ago. In Taihu region of the Yangtze delta, refulgent Liangzhu Culture continued some thousand years. The climate in the last period of Liangzhu Culture became more and more cold and wet. The rapid variance of the climate and environment is not direct or only causation but a important factor of the comedown of the famous ancient Culture.