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MIDDLE AND LATE HOLOCENE CLIMATIC CHANGES AND SEA LEVEL CHANGES AND PALEO-FLOODS OF MAQIAO, SHANGHAI

The Yangtze Delta is a frequent flood area. By study on Maqiao site in Shanghai, the authors researched on the influ-encence of climate and sea level changes on floods. There were three cultural interruptions. The first was under Liangzhu culture layer, the second was between Liangzhu and Maqiao culture layers and the last was on the Maqiao culture layer. They reflected three-floods and sea transgression processes. The first flood occurred from 6150 a B.P. to 4 400 a B. P. with the highest sea level and warm and humid climate. The second flood took place from 3 900 a B.P. to 3 250 a B.P. with warm climate and high sea level. The last flood happened during 2 450 a B.P. to 2 000 a B.P with dry and cold climate and low sea level.