%0 Journal Article
%T PRELIMINARY STUDY ON THE FLOOD EVENTS ABOUT 4 ka B.P.IN NORTH CHINA<br>我国北方4kaB.P.前后异常洪水事件的初步研究
%A Xia Zhengkai Yang Xiaoyan
%A <br>夏正楷
%A 杨晓燕
%J 第四纪研究
%D 2003
%I 
%X The preliminary study on the prehistoric flood events showed that the period of 4 ka B.P. or so was a high frequency flooding period in North China. The extreme flood disasters often occurred at the Huanghe River Basin, Huaihe River Basin and Haihe River Basin where lots of geological evidences were found at Guanting Basin located on the upper reaches of Huanghe River, Xinzhai and Mengzhuang in Henan Province, Taosi in Shanxi Province and Huang-Huai-Hai plain on the lower reaches of Huanghe River, Haihe River and Huaihe River. The evidence included the older terraces buried by the younger flood deposits, the floodplain splays, floodplain, alluvial fans and debris flow carried by the mountainous torrents and archaeological sites covered or destroyed by the flood, etc. The spore-pollen analysis indicated that the flooding period was rather cold and wet than before and after, responding to the worldwide cold event at 4 ka B.P. or so. The cold event was accompanied by relative high humidity and heavy rainfall, consequently prehistoric floods occurred widely. The flooding period influenced the development of Chinese Civilization profoundly. In the region of the upper and lower reaches of the Huanghe River, the extreme floods destroyed the environment in which man lived and resulted in the ancient civilization collapse, while the floods accelerated the cultural development and speeded the Chinese Civilization formation in the region of the middle reaches of the Huanghe River due to the special geomorphic settings. The Central China, which located in the transition area of the upper step and middle step of Chinese topography, is featured with the broad loess tableland. Though the floods threaten the past man, the flooding area was limited. The prehistoric man struggled against the floods by the advanced technology and favored geomorphic conditions for a long time, and speeded the development of early civilization. In the fight against the floods, the past man living in the region of the middle reaches of the Huanghe River improved the level of the productivity, advanced the technology and developed the ability of organization, even set up the first dynasty, the Xia Dynasty. Someone assumed that the Chinese Civilization resulted from the fight against the flood. This viewpoint demanded further detailed study.
%K about 4 ka B
%K P
%K North China
%K prehistoric extreme flood events
%K climatic settings
%K Chinese Civilization<br>4kaB.P.前后
%K 我国北方
%K 史前异常洪水事件
%K 气候背景
%K 华夏文明
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=EA07051745CDC8D89D5F01A3A4CFE6A9&aid=172886F7B55605CA&yid=D43C4A19B2EE3C0A&vid=EA389574707BDED3&iid=B31275AF3241DB2D&sid=06DAE5E1DF7D0B6A&eid=8B1FE194AD66DC3D&journal_id=1001-7410&journal_name=第四纪研究&referenced_num=15&reference_num=35