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长江中游是旱涝灾害频发区,但人们对该地区的古水文变化规律了解得很少.基于长江中游地区的大九湖泥炭沉积和清江和尚洞石笋研究,综合集成4个古水文代用指标,重建了本地区13ka以来的古水文,探讨其变化规律,识别出持续时间达千年以上的3个长时间尺度的较干时期(11.7~10.7ka BP、6.4~5.5ka BP、4.0~3.0ka BP)和3个长时间尺度的湿润期(13.0~11.7ka BP、8.7~6.4ka BP、3.0~1.7ka BP).其中,8.7~6.4ka BP的长时间湿润期可能具有大区域性乃至全球性的特点(全新世大暖期),对应于以定居的村落为规模的水稻种植发展.随后的6.4~5.5ka BP的长时间较干时期也具有大区域性乃至全球性的特点,对应地出现了复杂的、具有国家性质的社会.长时间的湿润期之前或之后出现了长时间较干时期.此外,还识别出5个短时间尺度的较干时期(9.8~9.2ka BP、9.0~8.7ka BP、5.0~4.2ka BP、1.7~1.1ka BP、0.7~0.0ka BP)与5个短时间尺度的湿润期(10.7~9.8ka BP、9.2~9.0ka BP、5.5~5.0ka BP、4.2~4.0ka BP、1.1~0.7ka BP).长江中游地区大部分较干时期表现出暖干的特点,这与北方的冷干现象不同.同时,湿润气候既可以出现在温暖时期,也可以出现在寒冷时期,水热配置存在不稳定性.尽管古温度与古水文的关系比较复杂,但当温度从一种状态向另一种状态转变时,长江中游地区的干旱程度加剧.长江中游古水文对古文化产生重要影响.
The middle reaches of the Yangtze River is a frequent area of droughts and floods, but little is known about the variation of paleo-hydrology in this area.Based on the research on the peat deposition of Daxiu Lake in the middle reaches of the Yangtze River and the stalagmite of Heshang Cave in Qingjiang River, , Rebuilt the ancient hydrology since 13 ka in this area and explored the variation regularity, and identified three dry periods (11.7 ~ 10.7ka BP, 6.4 ~ 5.5ka BP, 4.0 ~ 3.0ka BP) lasting for more than a thousand years BP) and three long-term wetting periods (13.0 ~ 11.7 ka BP, 8.7 ~ 6.4 ka BP, 3.0 ~ 1.7 ka BP), of which the long wetting period of 8.7 ~ 6.4 ka BP may have large regional and even global The characteristics of the sex (Holocene Megathermal) correspond to the development of rice planting on the scale of the settled settlements, followed by a long period of 6.4-5.5ka BP, which is also characterized by large regional and global characteristics. Correspondingly, A complex, nationally-characterized society has emerged, with long and dry periods occurring either before or after prolonged periods of wetting, in addition, five drier periods (9.8-9.2 ka BP, 8.7ka BP, 5.0-4.2ka BP, 1.7-1.1ka BP, 0.7-0.0ka BP) and 5 short (10.7 ~ 9.8ka BP, 9.2 ~ 9.0ka BP, 5.5 ~ 5.0ka BP, 4.2 ~ 4.0ka BP, 1.1 ~ 0.7ka BP) in the middle of the Yangtze River.The warm-dry Characteristics, which is different from the phenomenon of cold and dry in the north.At the same time, the humid climate may appear in the warm period, also can appear in the cold period, there is instability of hydrothermal configuration.Although ancient temperature and ancient hydrology is more complicated, When the temperature changes from one state to another, the degree of drought in the middle reaches of the Yangtze River intensifies, and the ancient hydrology in the middle reaches of the Yangtze River has an important impact on the ancient culture.